Array Interview Questions

Rank

#833HardFrequency: 100%

Bus Routes

Rank

#286MediumFrequency: 100%

Walls and Gates

Rank

#68HardFrequency: 100%

Text Justification

Rank

#1538MediumFrequency: 100%

Maximum Points You Can Obtain from Cards

Array Sliding Window Prefix Sum

Rank

#750HardFrequency: 100%

Contain Virus

Array Depth-First Search Breadth-First Search Matrix Simulation

Rank

#362MediumFrequency: 100%

Design Hit Counter

Array Binary Search Design Queue Data Stream

Rank

#200MediumFrequency: 97.3%

Number of Islands

Array Depth-First Search Breadth-First Search Union-Find Matrix

Rank

#269HardFrequency: 95.2%

Alien Dictionary

Array String Depth-First Search Breadth-First Search Graph Theory Topological Sort Directed Acyclic Graph

Rank

#1306EasyFrequency: 94.7%

Minimum Absolute Difference

#10

Rank

#1549MediumFrequency: 94.4%

Longest Continuous Subarray With Absolute Diff Less Than or Equal to Limit

Array Queue Sliding Window Heap (Priority Queue)Ordered Set Monotonic Queue

#11

Rank

#348MediumFrequency: 93.6%

Design Tic-Tac-Toe

Array Hash Table Design Matrix Simulation

#12

Rank

#215MediumFrequency: 93.3%

Kth Largest Element in an Array

Array Divide and Conquer Sorting Heap (Priority Queue)Quickselect

#13

Rank

#1352HardFrequency: 93%

Maximum Profit in Job Scheduling

#14

Rank

#329HardFrequency: 92.5%

Longest Increasing Path in a Matrix

Array Dynamic Programming Depth-First Search Breadth-First Search Graph Theory Topological Sort Memoization Matrix Directed Acyclic Graph

#15

Rank

#305HardFrequency: 89.9%

Number of Islands II

Array Hash Table Union-Find

#16

Rank

#300MediumFrequency: 89.7%

Longest Increasing Subsequence

Array Binary Search Dynamic Programming Longest Increasing Subsequence

#17

Rank

#42HardFrequency: 88%

Trapping Rain Water

Array Two Pointers Dynamic Programming Stack Monotonic Stack

#18

Rank

#912MediumFrequency: 87.7%

Random Pick with Weight

Array Math Binary Search Prefix Sum Randomized

#19

Rank

#560MediumFrequency: 87.2%

Subarray Sum Equals K

#20

Rank

#772MediumFrequency: 87%

Construct Quad Tree

Array Divide and Conquer Tree Matrix

#21

Rank

#694MediumFrequency: 86.6%

Number of Distinct Islands

Array Hash Table Depth-First Search Breadth-First Search Union-Find Sorting Matrix Hash Function

#22

Rank

#88EasyFrequency: 86.3%

Merge Sorted Array

#23

Rank

#162MediumFrequency: 85.8%

Find Peak Element

#24

Rank

#1019EasyFrequency: 85.8%

Squares of a Sorted Array

#25

Rank

#251MediumFrequency: 85.6%

Flatten 2D Vector

Array Two Pointers Design Iterator

#26

Rank

#56MediumFrequency: 84.6%

Merge Intervals

Array Sorting Quicksort

#27

Rank

#3876MediumFrequency: 84.3%

Transform Array to All Equal Elements

#28

Rank

#121EasyFrequency: 83.8%

Best Time to Buy and Sell Stock

#29

Rank

#253MediumFrequency: 83.8%

Meeting Rooms II

Array Two Pointers Greedy Sorting Heap (Priority Queue)Prefix Sum

#30

Rank

#198MediumFrequency: 83.7%

House Robber

#31

Rank

#1366MediumFrequency: 83.2%

First Unique Number

Array Hash Table Design Queue Data Stream

#32

Rank

#1046MediumFrequency: 83.2%

Max Consecutive Ones III

#33

Rank

#1112EasyFrequency: 82.7%

Find Words That Can Be Formed by Characters

#34

Rank

#1909MediumFrequency: 82.6%

Buildings With an Ocean View

#35

Rank

#1397MediumFrequency: 82.5%

Search Suggestions System

Array String Binary Search Trie Sorting Heap (Priority Queue)

#36

Rank

#1190MediumFrequency: 82.4%

Smallest Common Region

Array Hash Table String Tree Depth-First Search Breadth-First Search Binary Lifting Lowest Common Ancestor

#37

Rank

#1424HardFrequency: 82.4%

Maximum Candies You Can Get from Boxes

Array Breadth-First Search Graph Theory

#38

Rank

#244MediumFrequency: 82.3%

Shortest Word Distance II

Array Hash Table Two Pointers String Design

#39

Rank

#3231MediumFrequency: 82%

Minimum Number of Coins to be Added

#40

Rank

#1036MediumFrequency: 82%

Rotting Oranges

#41

Rank

#49MediumFrequency: 81.6%

Group Anagrams

#42

Rank

#347MediumFrequency: 81.3%

Top K Frequent Elements

Array Hash Table Divide and Conquer Sorting Heap (Priority Queue)Bucket Sort Counting Quickselect

#43

Rank

#53MediumFrequency: 81.1%

Maximum Subarray

Array Divide and Conquer Dynamic Programming

#44

Rank

#1171MediumFrequency: 80.9%

Shortest Path in Binary Matrix

#45

Rank

#2691MediumFrequency: 80.7%

Count Vowel Strings in Ranges

#46

Rank

#1713MediumFrequency: 79.6%

Dot Product of Two Sparse Vectors

Array Hash Table Two Pointers Design Linear Algebra

#47

Rank

#2023HardFrequency: 79.4%

Design Movie Rental System

Array Hash Table Design Heap (Priority Queue)Ordered Set

#48

Rank

#31MediumFrequency: 79%

Next Permutation

#49

Rank

#336HardFrequency: 78.6%

Palindrome Pairs

Array Hash Table String Trie Hash Function

#50

Rank

#631HardFrequency: 78.6%

Design Excel Sum Formula

Array Hash Table String Graph Theory Design Topological Sort Matrix

#51

Rank

#15MediumFrequency: 78.3%

3Sum

#52

Rank

#189MediumFrequency: 78.2%

Rotate Array

Array Math Two Pointers

#53

Rank

#213MediumFrequency: 78.1%

House Robber II

#54

Rank

#79MediumFrequency: 78%

Word Search

Array String Backtracking Depth-First Search Matrix

#55

Rank

#1014MediumFrequency: 77.1%

K Closest Points to Origin

Array Math Divide and Conquer Geometry Sorting Heap (Priority Queue)Quickselect K-D Tree

#56

Rank

#756MediumFrequency: 77.1%

Pour Water

#57

Rank

#3608HardFrequency: 76.9%

Find the Number of Subsequences With Equal GCD

Array Math Dynamic Programming Number Theory Euclidean Algorithm Greatest Common Divisor

#58

Rank

#4HardFrequency: 76.8%

Median of Two Sorted Arrays

Array Binary Search Divide and Conquer

#59

Rank

#11MediumFrequency: 76.7%

Container With Most Water

Array Two Pointers Greedy

#60

Rank

#2147HardFrequency: 76.6%

The Score of Students Solving Math Expression

Array Hash Table Math String Dynamic Programming Stack Memoization

#61

Rank

#1024HardFrequency: 76.6%

Triples with Bitwise AND Equal To Zero

#62

Rank

#1886MediumFrequency: 76.6%

Minimum Limit of Balls in a Bag

#63

Rank

#134MediumFrequency: 76.6%

Gas Station

#64

Rank

#3994EasyFrequency: 76.6%

Find The Least Frequent Digit

#65

Rank

#14EasyFrequency: 76.4%

Longest Common Prefix

Array String Trie

#66

Rank

#907MediumFrequency: 76.3%

Koko Eating Bananas

#67

Rank

#380MediumFrequency: 76.2%

Insert Delete GetRandom O(1)

Array Hash Table Math Design Randomized

#68

Rank

#238MediumFrequency: 76%

Product of Array Except Self

#69

Rank

#2640MediumFrequency: 76%

Maximum Number of Integers to Choose From a Range I

Array Hash Table Binary Search Greedy Sorting

#70

Rank

#2667HardFrequency: 76%

Maximum Frequency Score of a Subarray

Array Hash Table Math Stack Sliding Window

#71

Rank

#1165MediumFrequency: 76%

Meeting Scheduler

#72

Rank

#221MediumFrequency: 76%

Maximal Square

#73

Rank

#36MediumFrequency: 75.8%

Valid Sudoku

#74

Rank

#787HardFrequency: 75.6%

Sliding Puzzle

Array Dynamic Programming Backtracking Breadth-First Search Memoization Matrix Heuristic Search Bidirectional Search A* Search

#75

Rank

#3750MediumFrequency: 75.5%

Closest Equal Element Queries

Array Hash Table Binary Search

#76

Rank

#33MediumFrequency: 74.7%

Search in Rotated Sorted Array

#77

Rank

#1962MediumFrequency: 74.6%

Single-Threaded CPU

#78

Rank

#605EasyFrequency: 74.5%

Can Place Flowers

#79

Rank

#239HardFrequency: 74.4%

Sliding Window Maximum

Array Queue Sliding Window Heap (Priority Queue)Monotonic Queue Range Minimum/Maximum Query

#80

Rank

#1028MediumFrequency: 73.6%

Interval List Intersections

Array Two Pointers Sweep Line

#81

Rank

#51HardFrequency: 73.6%

N-Queens

Array Backtracking Algorithm X

#82

Rank

#212HardFrequency: 73.4%

Word Search II

Array String Backtracking Trie Matrix

#83

Rank

#729MediumFrequency: 73.4%

My Calendar I

Array Binary Search Design Segment Tree Ordered Set

#84

Rank

#2166HardFrequency: 73.2%

Number of Valid Move Combinations On Chessboard

Array String Backtracking Simulation

#85

Rank

#2301HardFrequency: 73.2%

Count Array Pairs Divisible by K

Array Hash Table Math Counting Number Theory Euclidean Algorithm Greatest Common Divisor

#86

Rank

#2654EasyFrequency: 73.2%

Count the Number of Vowel Strings in Range

Array String Counting

#87

Rank

#2702MediumFrequency: 73.2%

Maximum Number of Integers to Choose From a Range II

#88

Rank

#1583HardFrequency: 73.2%

Paint House III

#89

Rank

#1695MediumFrequency: 73.2%

Maximum Sum Obtained of Any Permutation

Array Greedy Sorting Prefix Sum

#90

Rank

#322MediumFrequency: 73.2%

Coin Change

Array Dynamic Programming Breadth-First Search Knapsack Problem Complete Knapsack

#91

Rank

#34MediumFrequency: 73.1%

Find First and Last Position of Element in Sorted Array

#92

Rank

#346EasyFrequency: 73.1%

Moving Average from Data Stream

Array Design Queue Data Stream

#93

Rank

#854HardFrequency: 72.8%

Making A Large Island

Array Depth-First Search Breadth-First Search Union-Find Matrix

#94

Rank

#152MediumFrequency: 72.5%

Maximum Product Subarray

#95

Rank

#2169MediumFrequency: 72.1%

Simple Bank System

Array Hash Table Design Simulation

#96

Rank

#3690HardFrequency: 71.5%

Smallest Substring With Identical Characters I

Array Binary Search Enumeration

#97

Rank

#317HardFrequency: 71.4%

Shortest Distance from All Buildings

#98

Rank

#54MediumFrequency: 71.1%

Spiral Matrix

#99

Rank

#1107MediumFrequency: 71.1%

Minimum Swaps to Group All 1's Together

#100

Rank

#26EasyFrequency: 70.8%

Remove Duplicates from Sorted Array

#101

Rank

#128MediumFrequency: 70.7%

Longest Consecutive Sequence

Array Hash Table Union-Find

#102

Rank

#169EasyFrequency: 70.4%

Majority Element

Array Hash Table Divide and Conquer Sorting Counting Boyer–Moore Majority Vote Algorithm

#103

Rank

#399MediumFrequency: 70.2%

Evaluate Division

Array String Depth-First Search Breadth-First Search Union-Find Graph Theory Shortest Path Bellman–Ford Algorithm Floyd–Warshall Algorithm

#104

Rank

#219EasyFrequency: 70.1%

Contains Duplicate II

#105

Rank

#2419HardFrequency: 69.8%

Subarray With Elements Greater Than Varying Threshold

Array Stack Union-Find Monotonic Stack

#106

Rank

#3181HardFrequency: 69.8%

Find Building Where Alice and Bob Can Meet

Array Binary Search Stack Binary Indexed Tree Segment Tree Heap (Priority Queue)Monotonic Stack

#107

Rank

#3779MediumFrequency: 69.8%

Eat Pizzas!

#108

Rank

#3778EasyFrequency: 69.8%

Transform Array by Parity

Array Sorting Counting

#109

Rank

#3875HardFrequency: 69.8%

Maximum Good Subtree Score

Array Dynamic Programming Bit Manipulation Tree Depth-First Search Bitmask

#110

Rank

#84HardFrequency: 69.6%

Largest Rectangle in Histogram

Array Stack Monotonic Stack Range Minimum/Maximum Query

#111

Rank

#698MediumFrequency: 69.2%

Partition to K Equal Sum Subsets

Array Dynamic Programming Backtracking Bit Manipulation Memoization Bitmask

#112

Rank

#1646EasyFrequency: 68.6%

Kth Missing Positive Number

#113

Rank

#3435HardFrequency: 68.4%

Block Placement Queries

Array Binary Search Binary Indexed Tree Segment Tree Ordered Set

#114

Rank

#55MediumFrequency: 67.9%

Jump Game

#115

Rank

#3356MediumFrequency: 67.9%

Shortest Uncommon Substring in an Array

#116

Rank

#761HardFrequency: 67.9%

Employee Free Time

Array Sweep Line Sorting Heap (Priority Queue)

#117

Rank

#628EasyFrequency: 67.8%

Maximum Product of Three Numbers

Array Math Sorting

#118

Rank

#3762HardFrequency: 67.6%

Maximize the Minimum Game Score

#119

Rank

#283EasyFrequency: 67.6%

Move Zeroes

#120

Rank

#4215HardFrequency: 67.6%

Good Subsequence Queries

Array Math Segment Tree Number Theory

#121

Rank

#636MediumFrequency: 67.4%

Exclusive Time of Functions

Array Stack

#122

Rank

#853MediumFrequency: 67.4%

Most Profit Assigning Work

#123

Rank

#498MediumFrequency: 67%

Diagonal Traverse

#124

Rank

#1249MediumFrequency: 66.8%

Snapshot Array

Array Hash Table Binary Search Design Persistent Data Structure

#125

Rank

#48MediumFrequency: 66.7%

Rotate Image

Array Math Matrix

#126

Rank

#360MediumFrequency: 66.5%

Sort Transformed Array

Array Math Two Pointers Sorting

#127

Rank

#1374MediumFrequency: 66.4%

Leftmost Column with at Least a One

Array Binary Search Matrix Interactive

#128

Rank

#713MediumFrequency: 66.4%

Subarray Product Less Than K

#129

Rank

#960HardFrequency: 66.4%

Minimize Malware Spread

Array Hash Table Depth-First Search Breadth-First Search Union-Find Graph Theory

#130

Rank

#3317MediumFrequency: 66.4%

Maximum Palindromes After Operations

Array Hash Table String Greedy Sorting Counting

#131

Rank

#122MediumFrequency: 66%

Best Time to Buy and Sell Stock II

#132

Rank

#256MediumFrequency: 65.8%

Paint House

#133

Rank

#1053MediumFrequency: 65.5%

Minimize Rounding Error to Meet Target

Array Math String Greedy Sorting

#134

Rank

#108EasyFrequency: 65.5%

Convert Sorted Array to Binary Search Tree

Array Divide and Conquer Tree Binary Search Tree Binary Tree

#135

Rank

#136EasyFrequency: 65.5%

Single Number

#136

Rank

#217EasyFrequency: 65.5%

Contains Duplicate

#137

Rank

#220HardFrequency: 65.5%

Contains Duplicate III

Array Sliding Window Sorting Bucket Sort Ordered Set

#138

Rank

#1409HardFrequency: 65.5%

Minimum Number of Flips to Convert Binary Matrix to Zero Matrix

Array Hash Table Bit Manipulation Breadth-First Search Matrix

#139

Rank

#638MediumFrequency: 65.5%

Shopping Offers

Array Dynamic Programming Backtracking Bit Manipulation Memoization Bitmask Knapsack Problem Complete Knapsack

#140

Rank

#3627MediumFrequency: 65.4%

Find Minimum Time to Reach Last Room I

Array Graph Theory Heap (Priority Queue)Matrix Shortest Path

#141

Rank

#2726HardFrequency: 65.2%

Minimum Reverse Operations

Array Hash Table Breadth-First Search Union-Find Ordered Set

#142

Rank

#2002HardFrequency: 65.2%

Stone Game VIII

Array Math Dynamic Programming Minimax Prefix Sum Game Theory Zero-Sum Game

#143

Rank

#3956HardFrequency: 65.2%

Trionic Array II

#144

Rank

#3982HardFrequency: 65.2%

Maximum Walls Destroyed by Robots

#145

Rank

#4274HardFrequency: 65.2%

Maximum Total Value

Array Math Binary Search Greedy

#146

Rank

#936MediumFrequency: 65.2%

RLE Iterator

Array Design Counting Iterator

#147

Rank

#3863MediumFrequency: 64.9%

Power Grid Maintenance

Array Hash Table Depth-First Search Breadth-First Search Union-Find Graph Theory Heap (Priority Queue)Ordered Set

#148

Rank

#658MediumFrequency: 64.6%

Find K Closest Elements

Array Two Pointers Binary Search Sliding Window Sorting Heap (Priority Queue)

#149

Rank

#75MediumFrequency: 64.1%

Sort Colors

Array Two Pointers Sorting Quicksort Bubble Sort

#150

Rank

#78MediumFrequency: 64%

Subsets

Array Backtracking Bit Manipulation

#151

Rank

#940MediumFrequency: 63.6%

Fruit Into Baskets

#152

Rank

#1414HardFrequency: 63.3%

Shortest Path in a Grid with Obstacles Elimination

#153

Rank

#621MediumFrequency: 63.1%

Task Scheduler

Array Hash Table Greedy Sorting Heap (Priority Queue)Counting

#154

Rank

#1570EasyFrequency: 63.1%

Final Prices With a Special Discount in a Shop

#155

Rank

#1085MediumFrequency: 63.1%

The Earliest Moment When Everyone Become Friends

Array Union-Find Sorting

#156

Rank

#1108MediumFrequency: 62.6%

Analyze User Website Visit Pattern

#157

Rank

#860MediumFrequency: 62.5%

Design Circular Queue

Array Linked List Design Queue

#158

Rank

#2077MediumFrequency: 62.5%

Largest Number After Mutating Substring

Array String Greedy

#159

Rank

#1219MediumFrequency: 62.5%

Longest Well-Performing Interval

Array Hash Table Stack Monotonic Stack Prefix Sum

#160

Rank

#2329MediumFrequency: 62.5%

Maximum Product After K Increments

#161

Rank

#3423HardFrequency: 62.5%

Maximum Sum of Subsequence With Non-adjacent Elements

Array Divide and Conquer Dynamic Programming Segment Tree

#162

Rank

#2466HardFrequency: 62.5%

Maximum Segment Sum After Removals

Array Union-Find Prefix Sum Ordered Set

#163

Rank

#2502EasyFrequency: 62.5%

Sort the People

#164

Rank

#2554HardFrequency: 62.5%

Minimum Total Distance Traveled

#165

Rank

#2584MediumFrequency: 62.5%

Number of Nodes With Value One

Array Tree Depth-First Search Breadth-First Search Binary Tree

#166

Rank

#2696MediumFrequency: 62.5%

The Number of Beautiful Subsets

Array Hash Table Math Dynamic Programming Backtracking Sorting Combinatorics

#167

Rank

#1930MediumFrequency: 62.5%

Maximum Number of Consecutive Values You Can Make

#168

Rank

#3952EasyFrequency: 62.5%

Trionic Array I

#169

Rank

#3974MediumFrequency: 62.5%

XOR After Range Multiplication Queries I

Array Divide and Conquer Simulation Prefix Sum

#170

Rank

#3975HardFrequency: 62.5%

XOR After Range Multiplication Queries II

Array Divide and Conquer Prefix Sum

#171

Rank

#3989HardFrequency: 62.5%

Sum of Beautiful Subsequences

Array Math Binary Indexed Tree Number Theory

#172

Rank

#3977HardFrequency: 62.5%

Count Non Adjacent Subsets in a Rooted Tree

#173

Rank

#1055MediumFrequency: 62.2%

Pairs of Songs With Total Durations Divisible by 60

#174

Rank

#1408MediumFrequency: 62.2%

Find the Smallest Divisor Given a Threshold

#175

Rank

#1478MediumFrequency: 62.2%

Maximum Number of Events That Can Be Attended

#176

Rank

#1127EasyFrequency: 62.2%

Last Stone Weight

#177

Rank

#735MediumFrequency: 62.2%

Asteroid Collision

#178

Rank

#971MediumFrequency: 61.8%

Shortest Bridge

Array Depth-First Search Breadth-First Search Matrix

#179

Rank

#243EasyFrequency: 61.6%

Shortest Word Distance

#180

Rank

#41HardFrequency: 61.4%

First Missing Positive

#181

Rank

#249MediumFrequency: 61.4%

Group Shifted Strings

#182

Rank

#721MediumFrequency: 61.4%

Accounts Merge

Array Hash Table String Depth-First Search Breadth-First Search Union-Find Sorting

#183

Rank

#2479HardFrequency: 61.4%

Meeting Rooms III

Array Hash Table Sorting Heap (Priority Queue)Simulation

#184

Rank

#739MediumFrequency: 61.4%

Daily Temperatures

#185

Rank

#817EasyFrequency: 61.4%

Design HashMap

Array Hash Table Linked List Design Hash Function

#186

Rank

#2237MediumFrequency: 61.1%

Longest Palindrome by Concatenating Two Letter Words

Array Hash Table String Greedy Counting

#187

Rank

#745EasyFrequency: 60.7%

Find Smallest Letter Greater Than Target

#188

Rank

#118EasyFrequency: 60.6%

Pascal's Triangle

#189

Rank

#139MediumFrequency: 60.5%

Word Break

Array Hash Table String Dynamic Programming Trie Memoization Brute-Force Search

#190

Rank

#1972MediumFrequency: 60.5%

Rotating the Box

Array Two Pointers Matrix

#191

Rank

#2175MediumFrequency: 59.9%

Count Nodes With the Highest Score

Array Tree Depth-First Search Binary Tree DP on Trees

#192

Rank

#523MediumFrequency: 59.8%

Continuous Subarray Sum

Array Hash Table Math Prefix Sum Pigeonhole Principle

#193

Rank

#321HardFrequency: 59.8%

Create Maximum Number

Array Two Pointers Stack Greedy Monotonic Stack

#194

Rank

#1559HardFrequency: 59.8%

Cherry Pickup II

#195

Rank

#675HardFrequency: 59.8%

Cut Off Trees for Golf Event

Array Breadth-First Search Heap (Priority Queue)Matrix

#196

Rank

#943MediumFrequency: 59.8%

Sum of Subarray Minimums

Array Dynamic Programming Stack Monotonic Stack

#197

Rank

#880HardFrequency: 59.8%

Rectangle Area II

Array Segment Tree Sweep Line Ordered Set

#198

Rank

#417MediumFrequency: 59.8%

Pacific Atlantic Water Flow

Array Depth-First Search Breadth-First Search Matrix

#199

Rank

#540MediumFrequency: 59.7%

Single Element in a Sorted Array

#200

Rank

#381HardFrequency: 59.7%

Insert Delete GetRandom O(1) - Duplicates allowed

Array Hash Table Math Design Randomized

#201

Rank

#3880MediumFrequency: 59.6%

Minimum Time to Visit All Houses

#202

Rank

#39MediumFrequency: 59.5%

Combination Sum

#203

Rank

#18MediumFrequency: 59.4%

4Sum

#204

Rank

#45MediumFrequency: 59.4%

Jump Game II

#205

Rank

#105MediumFrequency: 59.3%

Construct Binary Tree from Preorder and Inorder Traversal

Array Hash Table Divide and Conquer Tree Binary Tree

#206

Rank

#140HardFrequency: 59.3%

Word Break II

Array Hash Table String Dynamic Programming Backtracking Trie Memoization

#207

Rank

#2249MediumFrequency: 59.3%

Count the Hidden Sequences

#208

Rank

#695MediumFrequency: 59.3%

Max Area of Island

Array Depth-First Search Breadth-First Search Union-Find Matrix

#209

Rank

#1056MediumFrequency: 59.2%

Capacity To Ship Packages Within D Days

#210

Rank

#692MediumFrequency: 59.1%

Top K Frequent Words

Array Hash Table String Trie Sorting Heap (Priority Queue)Bucket Sort Counting

#211

Rank

#741HardFrequency: 59.1%

Cherry Pickup

#212

Rank

#3594MediumFrequency: 58.8%

Identify the Largest Outlier in an Array

Array Hash Table Counting Enumeration

#213

Rank

#2058EasyFrequency: 58.6%

Concatenation of Array

#214

Rank

#46MediumFrequency: 58.6%

Permutations

#215

Rank

#27EasyFrequency: 57.9%

Remove Element

#216

Rank

#74MediumFrequency: 57.7%

Search a 2D Matrix

Array Binary Search Matrix

#217

Rank

#410HardFrequency: 57.6%

Split Array Largest Sum

Array Binary Search Dynamic Programming Greedy Prefix Sum

#218

Rank

#480HardFrequency: 57.6%

Sliding Window Median

Array Hash Table Sliding Window Heap (Priority Queue)Treap

#219

Rank

#490MediumFrequency: 57.5%

The Maze

Array Depth-First Search Breadth-First Search Matrix

#220

Rank

#2344HardFrequency: 57.5%

Escape the Spreading Fire

Array Binary Search Breadth-First Search Matrix

#221

Rank

#2699MediumFrequency: 57.5%

Count the Number of Fair Pairs

#222

Rank

#740MediumFrequency: 57.5%

Delete and Earn

#223

Rank

#35EasyFrequency: 57%

Search Insert Position

#224

Rank

#1016MediumFrequency: 57%

Subarray Sums Divisible by K

#225

Rank

#259MediumFrequency: 57%

3Sum Smaller

#226

Rank

#1308MediumFrequency: 57%

Smallest String With Swaps

Array Hash Table String Depth-First Search Breadth-First Search Union-Find Sorting

#227

Rank

#240MediumFrequency: 56.8%

Search a 2D Matrix II

Array Binary Search Divide and Conquer Matrix

#228

Rank

#73MediumFrequency: 56.6%

Set Matrix Zeroes

#229

Rank

#1633HardFrequency: 56.5%

Minimum Number of Increments on Subarrays to Form a Target Array

Array Dynamic Programming Stack Greedy Monotonic Stack

#230

Rank

#149HardFrequency: 56.3%

Max Points on a Line

Array Hash Table Math Geometry Euclidean Algorithm Greatest Common Divisor

#231

Rank

#378MediumFrequency: 55.9%

Kth Smallest Element in a Sorted Matrix

Array Binary Search Sorting Heap (Priority Queue)Matrix

#232

Rank

#384MediumFrequency: 55.9%

Shuffle an Array

Array Math Design Randomized

#233

Rank

#890EasyFrequency: 55.9%

Lemonade Change

#234

Rank

#2594EasyFrequency: 55.8%

Count Pairs Of Similar Strings

Array Hash Table String Bit Manipulation Counting

#235

Rank

#3032HardFrequency: 55.8%

Maximize Value of Function in a Ball Passing Game

Array Dynamic Programming Bit Manipulation

#236

Rank

#4071MediumFrequency: 55.8%

Word Squares II

Array String Backtracking Sorting Enumeration

#237

Rank

#287MediumFrequency: 55.7%

Find the Duplicate Number

Array Two Pointers Binary Search Bit Manipulation Pigeonhole Principle Floyd's Cycle Finding Algorithm

#238

Rank

#167MediumFrequency: 55.5%

Two Sum II - Input Array Is Sorted

Array Two Pointers Binary Search

#239

Rank

#66EasyFrequency: 55.3%

Plus One

#240

Rank

#3113MediumFrequency: 55.1%

Beautiful Towers II

#241

Rank

#3114MediumFrequency: 55.1%

Beautiful Towers I

#242

Rank

#1102EasyFrequency: 55.1%

Check If a Number Is Majority Element in a Sorted Array

#243

Rank

#1137EasyFrequency: 55.1%

Height Checker

Array Sorting Counting Sort Bubble Sort

#244

Rank

#3215EasyFrequency: 55.1%

Matrix Similarity After Cyclic Shifts

Array Math Matrix Simulation

#245

Rank

#3294MediumFrequency: 55.1%

Number of Self-Divisible Permutations

Array Math Dynamic Programming Backtracking Bit Manipulation Number Theory Bitmask

#246

Rank

#3436HardFrequency: 55.1%

Find Subarray With Bitwise OR Closest to K

Array Binary Search Bit Manipulation Segment Tree

#247

Rank

#3460HardFrequency: 55.1%

Count the Number of Inversions

#248

Rank

#3459HardFrequency: 55.1%

Find the Minimum Area to Cover All Ones II

Array Matrix Enumeration

#249

Rank

#3461MediumFrequency: 55.1%

Find the Minimum Area to Cover All Ones I

#250

Rank

#3469EasyFrequency: 55.1%

Maximum Height of a Triangle

#251

Rank

#1803MediumFrequency: 55.1%

Average Waiting Time

#252

Rank

#3958MediumFrequency: 55.1%

Minimum Removals to Balance Array

Array Binary Search Sliding Window Sorting

#253

Rank

#284MediumFrequency: 55%

Peeking Iterator

Array Design Iterator

#254

Rank

#714MediumFrequency: 55%

Best Time to Buy and Sell Stock with Transaction Fee

#255

Rank

#2150HardFrequency: 55%

Kth Smallest Product of Two Sorted Arrays

#256

Rank

#3789HardFrequency: 55%

Maximize Subarrays After Removing One Conflicting Pair

Array Segment Tree Enumeration Prefix Sum

#257

Rank

#496EasyFrequency: 54.7%

Next Greater Element I

Array Hash Table Stack Monotonic Stack

#258

Rank

#163EasyFrequency: 54.7%

Missing Ranges

#259

Rank

#485EasyFrequency: 54.5%

Max Consecutive Ones

#260

Rank

#268EasyFrequency: 54.4%

Missing Number

Array Hash Table Math Binary Search Bit Manipulation Sorting

#261

Rank

#2543MediumFrequency: 54.4%

Most Popular Video Creator

Array Hash Table String Sorting Heap (Priority Queue)

#262

Rank

#2676MediumFrequency: 54.4%

Find the Score of All Prefixes of an Array

#263

Rank

#2856MediumFrequency: 54.4%

Count Complete Subarrays in an Array

#264

Rank

#3327HardFrequency: 54.4%

Minimum Moves to Pick K Ones

Array Greedy Sliding Window Prefix Sum

#265

Rank

#503MediumFrequency: 54.1%

Next Greater Element II

#266

Rank

#777EasyFrequency: 54.1%

Toeplitz Matrix

#267

Rank

#2119HardFrequency: 54.1%

Minimum Number of Operations to Make Array Continuous

Array Hash Table Binary Search Sliding Window

#268

Rank

#2294MediumFrequency: 54.1%

Minimum Time to Complete Trips

#269

Rank

#3613MediumFrequency: 54.1%

Maximize Amount After Two Days of Conversions

Array String Depth-First Search Breadth-First Search Graph Theory

#270

Rank

#3806MediumFrequency: 54.1%

Maximum Coin Collection

#271

Rank

#505MediumFrequency: 54.1%

The Maze II

Array Depth-First Search Breadth-First Search Graph Theory Heap (Priority Queue)Matrix Shortest Path Dijkstra's Algorithm Heuristic Search A* Search

#272

Rank

#525MediumFrequency: 53.4%

Contiguous Array

#273

Rank

#2651MediumFrequency: 53.4%

Count Ways to Group Overlapping Ranges

#274

Rank

#2679EasyFrequency: 53.4%

Count Distinct Numbers on Board

Array Hash Table Math Simulation

#275

Rank

#3244MediumFrequency: 53.4%

Minimize Length of Array Using Operations

Array Math Greedy Number Theory

#276

Rank

#1496EasyFrequency: 53.4%

Lucky Numbers in a Matrix

#277

Rank

#135HardFrequency: 53.3%

Candy

#278

Rank

#64MediumFrequency: 53.3%

Minimum Path Sum

#279

Rank

#3732MediumFrequency: 53.1%

Calculate Score After Performing Instructions

Array Hash Table String Simulation

#280

Rank

#1710HardFrequency: 53.1%

Find Servers That Handled Most Number of Requests

Array Heap (Priority Queue)Simulation Ordered Set

#281

Rank

#472HardFrequency: 53%

Concatenated Words

Array String Dynamic Programming Depth-First Search Trie Sorting

#282

Rank

#733EasyFrequency: 53%

Flood Fill

Array Depth-First Search Breadth-First Search Matrix

#283

Rank

#1305HardFrequency: 52.9%

Number of Visible People in a Queue

#284

Rank

#174HardFrequency: 52.9%

Dungeon Game

#285

Rank

#632HardFrequency: 52.9%

Smallest Range Covering Elements from K Lists

Array Hash Table Greedy Sliding Window Sorting Heap (Priority Queue)

#286

Rank

#976MediumFrequency: 52.9%

Minimum Area Rectangle

Array Hash Table Math Geometry Sorting

#287

Rank

#1605MediumFrequency: 52.9%

Minimum Number of Days to Make m Bouquets

#288

Rank

#407HardFrequency: 52.9%

Trapping Rain Water II

Array Breadth-First Search Heap (Priority Queue)Matrix

#289

Rank

#354HardFrequency: 52.7%

Russian Doll Envelopes

Array Binary Search Dynamic Programming Sorting Longest Increasing Subsequence

#290

Rank

#3254MediumFrequency: 52.4%

Number of Divisible Triplet Sums

#291

Rank

#532MediumFrequency: 52.4%

K-diff Pairs in an Array

Array Hash Table Two Pointers Binary Search Sorting

#292

Rank

#2574HardFrequency: 52.4%

Count Subarrays With Median K

#293

Rank

#1022HardFrequency: 52.4%

Unique Paths III

Array Backtracking Bit Manipulation Matrix Hamiltonian Path

#294

Rank

#373MediumFrequency: 52.2%

Find K Pairs with Smallest Sums

#295

Rank

#37HardFrequency: 52.1%

Sudoku Solver

Array Hash Table Backtracking Matrix Algorithm X Dancing Links

#296

Rank

#648MediumFrequency: 52.1%

Replace Words

#297

Rank

#3277HardFrequency: 52.1%

Find the Number of Ways to Place People II

Array Math Geometry Sorting Enumeration

#298

Rank

#3628MediumFrequency: 52.1%

Find Minimum Time to Reach Last Room II

Array Graph Theory Heap (Priority Queue)Matrix Shortest Path

#299

Rank

#416MediumFrequency: 52%

Partition Equal Subset Sum

Array Dynamic Programming Knapsack Problem 0-1 Knapsack

#300

Rank

#792EasyFrequency: 51.8%

Binary Search

#301

Rank

#303EasyFrequency: 51.8%

Range Sum Query - Immutable

Array Design Prefix Sum

#302

Rank

#1966MediumFrequency: 51.8%

Frequency of the Most Frequent Element

Array Binary Search Greedy Sliding Window Sorting Prefix Sum

#303

Rank

#403HardFrequency: 51.8%

Frog Jump

#304

Rank

#16MediumFrequency: 51.4%

3Sum Closest

#305

Rank

#179MediumFrequency: 51.4%

Largest Number

Array String Greedy Sorting

#306

Rank

#209MediumFrequency: 51.4%

Minimum Size Subarray Sum

#307

Rank

#252EasyFrequency: 51.4%

Meeting Rooms

Array Sorting Quicksort

#308

Rank

#2075MediumFrequency: 51.4%

Brightest Position on Street

Array Sorting Prefix Sum Ordered Set

#309

Rank

#2725MediumFrequency: 51.3%

Mice and Cheese

#310

Rank

#1888EasyFrequency: 51.3%

Find Nearest Point That Has the Same X or Y Coordinate

#311

Rank

#542MediumFrequency: 51.3%

01 Matrix

Array Dynamic Programming Breadth-First Search Matrix

#312

Rank

#456MediumFrequency: 51.3%

132 Pattern

Array Binary Search Stack Monotonic Stack Ordered Set

#313

Rank

#85HardFrequency: 51.1%

Maximal Rectangle

Array Dynamic Programming Stack Matrix Monotonic Stack

#314

Rank

#349EasyFrequency: 51.1%

Intersection of Two Arrays

Array Hash Table Two Pointers Binary Search Sorting

#315

Rank

#565MediumFrequency: 51%

Array Nesting

Array Depth-First Search

#316

Rank

#1038HardFrequency: 51%

Number of Squareful Arrays

Array Hash Table Math Dynamic Programming Backtracking Bit Manipulation Bitmask

#317

Rank

#150MediumFrequency: 50.6%

Evaluate Reverse Polish Notation

Array Math Stack

#318

Rank

#245MediumFrequency: 50.6%

Shortest Word Distance III

#319

Rank

#697EasyFrequency: 50.6%

Degree of an Array

#320

Rank

#3224HardFrequency: 50.6%

Count the Number of Infection Sequences

Array Math Combinatorics Fermat's Little Theorem

#321

Rank

#852MediumFrequency: 50.5%

Friends Of Appropriate Ages

#322

Rank

#881MediumFrequency: 50.3%

Loud and Rich

Array Depth-First Search Graph Theory Topological Sort Directed Acyclic Graph

#323

Rank

#982MediumFrequency: 50.3%

Minimum Increment to Make Array Unique

Array Greedy Sorting Counting

#324

Rank

#153MediumFrequency: 50%

Find Minimum in Rotated Sorted Array

#325

Rank

#753MediumFrequency: 49.9%

Open the Lock

Array Hash Table String Breadth-First Search Bidirectional Search

#326

Rank

#999MediumFrequency: 49.9%

Regions Cut By Slashes

Array Hash Table Depth-First Search Breadth-First Search Union-Find Matrix Planar Graph

#327

Rank

#1985MediumFrequency: 49.9%

Maximum Subarray Min-Product

Array Stack Monotonic Stack Prefix Sum Cartesian Tree

#328

Rank

#2527HardFrequency: 49.9%

Count Subarrays With Fixed Bounds

Array Queue Sliding Window Monotonic Queue

#329

Rank

#2977EasyFrequency: 49.9%

Check if a String Is an Acronym of Words

#330

Rank

#3034EasyFrequency: 49.9%

Points That Intersect With Cars

#331

Rank

#2889MediumFrequency: 49.9%

Number of Black Blocks

#332

Rank

#4253MediumFrequency: 49.9%

Minimum Cost to Equalize Arrays Using Swaps

#333

Rank

#1878EasyFrequency: 49.7%

Check if Array Is Sorted and Rotated

#334

Rank

#3541MediumFrequency: 49.3%

Report Spam Message

#335

Rank

#80MediumFrequency: 48.9%

Remove Duplicates from Sorted Array II

#336

Rank

#3751MediumFrequency: 48.9%

Maximum Frequency After Subarray Operation

Array Hash Table Dynamic Programming Greedy Enumeration Prefix Sum

#337

Rank

#3897HardFrequency: 48.8%

Count Number of Trapezoids II

Array Hash Table Math Geometry

#338

Rank

#57MediumFrequency: 48.8%

Insert Interval

#339

Rank

#311MediumFrequency: 48.8%

Sparse Matrix Multiplication

Array Hash Table Matrix Linear Algebra

#340

Rank

#2133MediumFrequency: 48.7%

Number of Pairs of Strings With Concatenation Equal to Target

#341

Rank

#2482MediumFrequency: 48.7%

Maximum Rows Covered by Columns

Array Backtracking Bit Manipulation Matrix Enumeration

#342

Rank

#3248HardFrequency: 48.7%

Count the Number of Incremovable Subarrays II

Array Two Pointers Binary Search

#343

Rank

#3252EasyFrequency: 48.7%

Count the Number of Incremovable Subarrays I

Array Two Pointers Binary Search Enumeration

#344

Rank

#3272MediumFrequency: 48.7%

Find the Grid of Region Average

#345

Rank

#473MediumFrequency: 48%

Matchsticks to Square

Array Dynamic Programming Backtracking Bit Manipulation Bitmask

#346

Rank

#875MediumFrequency: 48%

Longest Mountain in Array

Array Two Pointers Dynamic Programming Enumeration

#347

Rank

#2165MediumFrequency: 47.7%

Plates Between Candles

Array String Binary Search Prefix Sum

#348

Rank

#419MediumFrequency: 47.5%

Battleships in a Board

Array Depth-First Search Matrix

#349

Rank

#643EasyFrequency: 47.5%

Maximum Average Subarray I

#350

Rank

#465HardFrequency: 47.5%

Optimal Account Balancing

Array Dynamic Programming Backtracking Bit Manipulation Bitmask

#351

Rank

#690MediumFrequency: 47.5%

Employee Importance

Array Hash Table Tree Depth-First Search Breadth-First Search

#352

Rank

#699HardFrequency: 47.5%

Falling Squares

Array Segment Tree Ordered Set

#353

Rank

#894HardFrequency: 47.5%

Random Pick with Blacklist

Array Hash Table Math Binary Search Sorting Randomized

#354

Rank

#1066EasyFrequency: 47.5%

Fixed Point

#355

Rank

#1111MediumFrequency: 47.5%

Minimum Score Triangulation of Polygon

Array Dynamic Programming Triangulation Polygons

#356

Rank

#1486EasyFrequency: 47.5%

Find the Distance Value Between Two Arrays

#357

Rank

#1820HardFrequency: 47.5%

Number Of Ways To Reconstruct A Tree

Array Hash Table Tree Graph Theory Simulation

#358

Rank

#1824MediumFrequency: 47.5%

Maximum Number of Eaten Apples

#359

Rank

#1940MediumFrequency: 47.5%

Maximum XOR for Each Query

Array Bit Manipulation Prefix Sum

#360

Rank

#1946MediumFrequency: 47.5%

Minimum Absolute Sum Difference

Array Binary Search Sorting Ordered Set

#361

Rank

#2038MediumFrequency: 47.5%

Nearest Exit from Entrance in Maze

#362

Rank

#2065HardFrequency: 47.5%

Check for Contradictions in Equations

Array String Depth-First Search Union-Find Graph Theory

#363

Rank

#2085MediumFrequency: 47.5%

Array With Elements Not Equal to Average of Neighbors

#364

Rank

#2093EasyFrequency: 47.5%

Check If String Is a Prefix of Array

#365

Rank

#2099EasyFrequency: 47.5%

Number of Strings That Appear as Substrings in Word

#366

Rank

#2306MediumFrequency: 47.5%

Create Binary Tree From Descriptions

Array Hash Table Tree Binary Tree

#367

Rank

#2331EasyFrequency: 47.5%

Intersection of Multiple Arrays

Array Hash Table Sorting Counting

#368

Rank

#2339MediumFrequency: 47.5%

K Divisible Elements Subarrays

Array Hash Table Trie Rolling Hash Hash Function Enumeration

#369

Rank

#2418MediumFrequency: 47.5%

Minimum Sum of Squared Difference

Array Binary Search Greedy Sorting Heap (Priority Queue)

#370

Rank

#2425MediumFrequency: 47.5%

Number of People That Can Be Seen in a Grid

Array Stack Matrix Monotonic Stack

#371

Rank

#2673MediumFrequency: 47.5%

Maximize Win From Two Segments

Array Binary Search Sliding Window

#372

Rank

#3333MediumFrequency: 47.5%

Find Pattern in Infinite Stream I

Array Sliding Window Rolling Hash String Matching Interactive Hash Function

#373

Rank

#3335MediumFrequency: 47.5%

Minimum Operations to Write the Letter Y on a Grid

Array Hash Table Matrix Counting

#374

Rank

#3352HardFrequency: 47.5%

Find Pattern in Infinite Stream II

Array Sliding Window Rolling Hash String Matching Interactive Hash Function

#375

Rank

#3378MediumFrequency: 47.5%

Maximum Increasing Triplet Value

Array Ordered Set

#376

Rank

#3385MediumFrequency: 47.5%

Match Alphanumerical Pattern in Matrix I

Array Hash Table String Matrix

#377

Rank

#3475MediumFrequency: 47.5%

Minimum Operations to Make Binary Array Elements Equal to One I

Array Bit Manipulation Queue Sliding Window Prefix Sum

#378

Rank

#3477MediumFrequency: 47.5%

Minimum Operations to Make Binary Array Elements Equal to One II

#379

Rank

#3980MediumFrequency: 47.5%

Best Time to Buy and Sell Stock using Strategy

Array Sliding Window Prefix Sum

#380

Rank

#2426MediumFrequency: 47.4%

Maximum Profit From Trading Stocks

#381

Rank

#3715MediumFrequency: 47.3%

Maximum Coins From K Consecutive Bags

Array Binary Search Greedy Sliding Window Sorting Prefix Sum

#382

Rank

#204MediumFrequency: 47.3%

Count Primes

Array Math Enumeration Number Theory Primality Test Sieve Theory Prime Number Sieve

#383

Rank

#448EasyFrequency: 47%

Find All Numbers Disappeared in an Array

#384

Rank

#1603EasyFrequency: 47%

Running Sum of 1d Array

#385

Rank

#130MediumFrequency: 46.9%

Surrounded Regions

Array Depth-First Search Breadth-First Search Union-Find Matrix

#386

Rank

#47MediumFrequency: 46.9%

Permutations II

Array Backtracking Sorting

#387

Rank

#3639MediumFrequency: 46.7%

Zero Array Transformation I

#388

Rank

#948MediumFrequency: 46.7%

Sort an Array

Array Divide and Conquer Sorting Heap (Priority Queue)Merge Sort Bucket Sort Radix Sort Counting Sort

#389

Rank

#882MediumFrequency: 46.7%

Peak Index in a Mountain Array

Array Binary Search Ternary Search

#390

Rank

#2366MediumFrequency: 46.7%

Maximum Bags With Full Capacity of Rocks

#391

Rank

#2436EasyFrequency: 46.5%

Make Array Zero by Subtracting Equal Amounts

Array Hash Table Greedy Sorting Heap (Priority Queue)Simulation

#392

Rank

#1539MediumFrequency: 46.5%

Diagonal Traverse II

#393

Rank

#2019MediumFrequency: 46.5%

Product of Two Run-Length Encoded Arrays

#394

Rank

#1034HardFrequency: 46%

Subarrays with K Different Integers

Array Hash Table Sliding Window Counting

#395

Rank

#1400EasyFrequency: 46%

Find Winner on a Tic Tac Toe Game

Array Hash Table Matrix Simulation

#396

Rank

#3763MediumFrequency: 45.9%

Separate Squares I

#397

Rank

#1451HardFrequency: 45.7%

Minimum Number of Taps to Open to Water a Garden

#398

Rank

#1829EasyFrequency: 45.7%

Maximum Units on a Truck

#399

Rank

#895HardFrequency: 45.2%

Shortest Path to Get All Keys

Array Bit Manipulation Breadth-First Search Matrix

#400

Rank

#1220HardFrequency: 45.2%

Smallest Sufficient Team

#401

Rank

#123HardFrequency: 45%

Best Time to Buy and Sell Stock III

#402

Rank

#90MediumFrequency: 44.8%

Subsets II

Array Backtracking Bit Manipulation

#403

Rank

#2364HardFrequency: 44.8%

Longest Path With Different Adjacent Characters

Array String Tree Depth-First Search Graph Theory Topological Sort

#404

Rank

#1485HardFrequency: 44.8%

Minimum Cost to Make at Least One Valid Path in a Grid

Array Breadth-First Search Graph Theory Heap (Priority Queue)Matrix Shortest Path 0-1 BFS Dijkstra's Algorithm

#405

Rank

#170EasyFrequency: 44.7%

Two Sum III - Data structure design

Array Hash Table Two Pointers Design Data Stream

#406

Rank

#2423HardFrequency: 44.7%

Minimum Deletions to Make Array Divisible

Array Math Sorting Heap (Priority Queue)Number Theory Euclidean Algorithm Greatest Common Divisor

#407

Rank

#2570MediumFrequency: 44.7%

Maximize Total Tastiness of Purchased Fruits

#408

Rank

#2642HardFrequency: 44.7%

Time to Cross a Bridge

#409

Rank

#983MediumFrequency: 44.7%

Validate Stack Sequences

#410

Rank

#1445MediumFrequency: 44.7%

Number of Sub-arrays of Size K and Average Greater than or Equal to Threshold

#411

Rank

#1693EasyFrequency: 44.7%

Sum of All Odd Length Subarrays

Array Math Prefix Sum

#412

Rank

#4065HardFrequency: 44.7%

Count Sequences to K

Array Math Dynamic Programming Memoization Number Theory

#413

Rank

#4149MediumFrequency: 44.7%

Minimum Increase to Maximize Special Indices

Array Dynamic Programming Greedy Prefix Sum

#414

Rank

#3886MediumFrequency: 44.6%

Count Number of Trapezoids I

Array Hash Table Math Geometry

#415

Rank

#493HardFrequency: 44.6%

Reverse Pairs

Array Binary Search Divide and Conquer Binary Indexed Tree Segment Tree Merge Sort Ordered Set Treap

#416

Rank

#2271MediumFrequency: 44.6%

Rearrange Array Elements by Sign

#417

Rank

#529MediumFrequency: 44.4%

Minesweeper

Array Depth-First Search Breadth-First Search Matrix

#418

Rank

#1059MediumFrequency: 44.4%

Missing Element in Sorted Array

#419

Rank

#873HardFrequency: 44.3%

Guess the Word

Array Math String Minimax Interactive Game Theory

#420

Rank

#494MediumFrequency: 44.1%

Target Sum

Array Dynamic Programming Backtracking Knapsack Problem 0-1 Knapsack

#421

Rank

#442MediumFrequency: 44%

Find All Duplicates in an Array

#422

Rank

#1706MediumFrequency: 44%

Min Cost to Connect All Points

Array Union-Find Graph Theory Minimum Spanning Tree Prim's Algorithm Kruskal's Algorithm Borůvka's Algorithm

#423

Rank

#938HardFrequency: 44%

Numbers At Most N Given Digit Set

Array Math String Binary Search Dynamic Programming

#424

Rank

#1370MediumFrequency: 44%

Count Number of Nice Subarrays

Array Hash Table Math Sliding Window Prefix Sum

#425

Rank

#581MediumFrequency: 44%

Shortest Unsorted Continuous Subarray

Array Two Pointers Stack Greedy Sorting Monotonic Stack

#426

Rank

#1951MediumFrequency: 43.7%

Find the Winner of the Circular Game

Array Math Recursion Queue Simulation

#427

Rank

#2354MediumFrequency: 43.6%

Minimum Health to Beat Game

#428

Rank

#1184MediumFrequency: 43.2%

Car Pooling

Array Sorting Heap (Priority Queue)Simulation Prefix Sum

#429

Rank

#1196MediumFrequency: 43.2%

Filling Bookcase Shelves

#430

Rank

#1499HardFrequency: 43.2%

Maximum Performance of a Team

#431

Rank

#332HardFrequency: 43.2%

Reconstruct Itinerary

Array String Depth-First Search Graph Theory Sorting Heap (Priority Queue)Eulerian Circuit Eulerian Path Semi-Eulerian Graph

#432

Rank

#2867MediumFrequency: 43.2%

Ways to Split Array Into Good Subarrays

#433

Rank

#1675MediumFrequency: 43.2%

Magnetic Force Between Two Balls

#434

Rank

#2846HardFrequency: 43.2%

Robot Collisions

Array Stack Sorting Simulation

#435

Rank

#917MediumFrequency: 43.2%

Boats to Save People

Array Two Pointers Greedy Sorting Timsort

#436

Rank

#435MediumFrequency: 43.1%

Non-overlapping Intervals

Array Dynamic Programming Greedy Sorting

#437

Rank

#747EasyFrequency: 43.1%

Min Cost Climbing Stairs

#438

Rank

#296HardFrequency: 43.1%

Best Meeting Point

Array Math Sorting Matrix

#439

Rank

#2270MediumFrequency: 43%

Find All Lonely Numbers in the Array

#440

Rank

#2587MediumFrequency: 43%

Design Memory Allocator

Array Hash Table Design Simulation

#441

Rank

#2334HardFrequency: 43%

Number of Flowers in Full Bloom

Array Hash Table Binary Search Sorting Prefix Sum Ordered Set

#442

Rank

#2040HardFrequency: 43%

Minimum Cost to Reach Destination in Time

Array Dynamic Programming Graph Theory Dijkstra's Algorithm

#443

Rank

#3825MediumFrequency: 42.7%

Apply Substitutions

Array Hash Table String Depth-First Search Breadth-First Search Graph Theory Topological Sort

#444

Rank

#229MediumFrequency: 42.5%

Majority Element II

Array Hash Table Sorting Counting Boyer–Moore Majority Vote Algorithm

#445

Rank

#724EasyFrequency: 42%

Find Pivot Index

#446

Rank

#312HardFrequency: 41.7%

Burst Balloons

#447

Rank

#1319EasyFrequency: 41.7%

Unique Number of Occurrences

#448

Rank

#808MediumFrequency: 41.6%

Number of Matching Subsequences

Array Hash Table String Binary Search Dynamic Programming Trie Sorting

#449

Rank

#1025MediumFrequency: 41.6%

Minimum Cost For Tickets

#450

Rank

#2717HardFrequency: 41.6%

Collect Coins in a Tree

Array Tree Graph Theory Topological Sort

#451

Rank

#2914MediumFrequency: 41.6%

Find the Safest Path in a Grid

Array Binary Search Breadth-First Search Union-Find Heap (Priority Queue)Matrix

#452

Rank

#1457HardFrequency: 41.5%

Minimum Difficulty of a Job Schedule

#453

Rank

#645EasyFrequency: 41.4%

Set Mismatch

Array Hash Table Bit Manipulation Sorting

#454

Rank

#945MediumFrequency: 41.4%

Snakes and Ladders

#455

Rank

#255MediumFrequency: 41.2%

Verify Preorder Sequence in Binary Search Tree

Array Stack Tree Binary Search Tree Recursion Monotonic Stack Binary Tree

#456

Rank

#2547EasyFrequency: 41.2%

Odd String Difference

#457

Rank

#1331MediumFrequency: 41.2%

Path with Maximum Gold

Array Backtracking Matrix

#458

Rank

#2450HardFrequency: 41.2%

Minimum Replacements to Sort the Array

Array Math Greedy

#459

Rank

#1766HardFrequency: 40.9%

Minimum Number of Removals to Make Mountain Array

Array Binary Search Dynamic Programming Greedy

#460

Rank

#2581MediumFrequency: 40.9%

Divide Players Into Teams of Equal Skill

#461

Rank

#1129MediumFrequency: 40.9%

Longest String Chain

Array Hash Table Two Pointers String Dynamic Programming Sorting

#462

Rank

#63MediumFrequency: 40.8%

Unique Paths II

#463

Rank

#81MediumFrequency: 40.8%

Search in Rotated Sorted Array II

#464

Rank

#1762MediumFrequency: 40.8%

Furthest Building You Can Reach

#465

Rank

#2324MediumFrequency: 40.8%

Find Triangular Sum of an Array

Array Math Simulation Combinatorics Number Theory

#466

Rank

#334MediumFrequency: 40.7%

Increasing Triplet Subsequence

Array Greedy Longest Increasing Subsequence

#467

Rank

#137MediumFrequency: 40.5%

Single Number II

#468

Rank

#1580EasyFrequency: 40.5%

Shuffle the Array

#469

Rank

#1207MediumFrequency: 40.2%

Delete Nodes And Return Forest

Array Hash Table Tree Depth-First Search Binary Tree

#470

Rank

#455EasyFrequency: 40.2%

Assign Cookies

Array Two Pointers Greedy Sorting Quicksort

#471

Rank

#2368HardFrequency: 40.2%

Sum of Total Strength of Wizards

Array Stack Monotonic Stack Prefix Sum

#472

Rank

#3421EasyFrequency: 40.2%

Count Pairs That Form a Complete Day I

#473

Rank

#2267HardFrequency: 40.2%

Minimum Difference in Sums After Removal of Elements

Array Dynamic Programming Heap (Priority Queue)

#474

Rank

#954MediumFrequency: 40.2%

Maximum Sum Circular Subarray

Array Divide and Conquer Dynamic Programming Queue Monotonic Queue

#475

Rank

#794HardFrequency: 40%

Swim in Rising Water

Array Binary Search Depth-First Search Breadth-First Search Union-Find Minimax Heap (Priority Queue)Matrix Dijkstra's Algorithm

#476

Rank

#1931MediumFrequency: 40%

Shortest Path in a Hidden Grid

Array Depth-First Search Breadth-First Search Matrix Interactive

#477

Rank

#368MediumFrequency: 39.5%

Largest Divisible Subset

Array Math Dynamic Programming Sorting

#478

Rank

#1626EasyFrequency: 39.5%

Can Make Arithmetic Progression From Sequence

#479

Rank

#2227MediumFrequency: 39.5%

Sum of Subarray Ranges

#480

Rank

#274MediumFrequency: 39.4%

H-Index

Array Sorting Counting Sort

#481

Rank

#309MediumFrequency: 39.4%

Best Time to Buy and Sell Stock with Cooldown

#482

Rank

#477MediumFrequency: 39.4%

Total Hamming Distance

#483

Rank

#611MediumFrequency: 39.4%

Valid Triangle Number

#484

Rank

#265HardFrequency: 39.4%

Paint House II

#485

Rank

#1783MediumFrequency: 39.2%

Ways to Make a Fair Array

#486

Rank

#2220MediumFrequency: 39.1%

Find All Possible Recipes from Given Supplies

Array Hash Table String Graph Theory Topological Sort Directed Acyclic Graph

#487

Rank

#188HardFrequency: 39.1%

Best Time to Buy and Sell Stock IV

#488

Rank

#2565MediumFrequency: 39.1%

Merge Operations to Turn Array Into a Palindrome

Array Two Pointers Greedy

#489

Rank

#3329MediumFrequency: 39.1%

Find the Length of the Longest Common Prefix

#490

Rank

#1923MediumFrequency: 39.1%

Sentence Similarity III

#491

Rank

#2780MediumFrequency: 39.1%

Make Costs of Paths Equal in a Binary Tree

Array Dynamic Programming Greedy Tree Binary Tree

#492

Rank

#40MediumFrequency: 39.1%

Combination Sum II

#493

Rank

#582MediumFrequency: 39.1%

Kill Process

Array Hash Table Tree Depth-First Search Breadth-First Search

#494

Rank

#3654MediumFrequency: 39.1%

Minimum Array Sum

#495

Rank

#679HardFrequency: 39%

24 Game

Array Math Backtracking

#496

Rank

#1002MediumFrequency: 39%

Maximum Width Ramp

Array Two Pointers Stack Monotonic Stack

#497

Rank

#3643MediumFrequency: 39%

Zero Array Transformation II

Array Two Pointers Binary Search Prefix Sum

#498

Rank

#1528EasyFrequency: 38.9%

Kids With the Greatest Number of Candies

#499

Rank

#4270MediumFrequency: 38.9%

Minimum Operations to Make Array Non Decreasing

#500

Rank

#228EasyFrequency: 38.6%

Summary Ranges

#501

Rank

#3227EasyFrequency: 38.2%

Find Missing and Repeated Values

Array Hash Table Math Matrix

#502

Rank

#518MediumFrequency: 38.2%

Coin Change II

Array Dynamic Programming Knapsack Problem Complete Knapsack

#503

Rank

#2552MediumFrequency: 38.2%

Maximum Sum of Distinct Subarrays With Length K

#504

Rank

#106MediumFrequency: 38.2%

Construct Binary Tree from Inorder and Postorder Traversal

Array Hash Table Divide and Conquer Tree Binary Tree

#505

Rank

#3402HardFrequency: 38.2%

Minimum Cost to Equalize Array

Array Greedy Enumeration

#506

Rank

#218HardFrequency: 37.9%

The Skyline Problem

Array Divide and Conquer Binary Indexed Tree Segment Tree Sweep Line Sorting Heap (Priority Queue)Ordered Set

#507

Rank

#990EasyFrequency: 37.9%

Verifying an Alien Dictionary

#508

Rank

#2564MediumFrequency: 37.9%

Most Profitable Path in a Tree

Array Tree Depth-First Search Breadth-First Search Graph Theory

#509

Rank

#2779MediumFrequency: 37.9%

Number of Adjacent Elements With the Same Color

#510

Rank

#2588HardFrequency: 37.9%

Maximum Number of Points From Grid Queries

Array Two Pointers Breadth-First Search Union-Find Sorting Heap (Priority Queue)Matrix

#511

Rank

#902HardFrequency: 37.9%

Minimum Number of Refueling Stops

Array Dynamic Programming Greedy Heap (Priority Queue)

#512

Rank

#120MediumFrequency: 37.4%

Triangle

#513

Rank

#1050MediumFrequency: 37.4%

Construct Binary Search Tree from Preorder Traversal

Array Stack Tree Binary Search Tree Monotonic Stack Binary Tree

#514

Rank

#3950MediumFrequency: 37.4%

Maximum K to Sort a Permutation

#515

Rank

#4077MediumFrequency: 37.4%

Lexicographically Smallest Negated Permutation that Sums to Target

Array Math Two Pointers Greedy Sorting

#516

Rank

#1402MediumFrequency: 37.3%

Count Square Submatrices with All Ones

#517

Rank

#1753MediumFrequency: 37.3%

Path With Minimum Effort

Array Binary Search Depth-First Search Breadth-First Search Union-Find Heap (Priority Queue)Matrix Dijkstra's Algorithm

#518

Rank

#59MediumFrequency: 37%

Spiral Matrix II

#519

Rank

#2206MediumFrequency: 36.9%

Detonate the Maximum Bombs

Array Math Depth-First Search Breadth-First Search Graph Theory Geometry

#520

Rank

#689HardFrequency: 36.8%

Maximum Sum of 3 Non-Overlapping Subarrays

Array Dynamic Programming Sliding Window Prefix Sum

#521

Rank

#2045MediumFrequency: 36.8%

Cutting Ribbons

#522

Rank

#486MediumFrequency: 36.7%

Predict the Winner

Array Math Dynamic Programming Recursion Minimax Game Theory Zero-Sum Game

#523

Rank

#966MediumFrequency: 36.3%

Binary Subarrays With Sum

Array Hash Table Sliding Window Prefix Sum

#524

Rank

#1017HardFrequency: 35.8%

Odd Even Jump

Array Dynamic Programming Stack Sorting Monotonic Stack Ordered Set

#525

Rank

#1087MediumFrequency: 35.7%

Longest Arithmetic Subsequence

Array Hash Table Binary Search Dynamic Programming

#526

Rank

#1426EasyFrequency: 35.7%

Find N Unique Integers Sum up to Zero

#527

Rank

#1510EasyFrequency: 35.7%

Find Lucky Integer in an Array

#528

Rank

#1983EasyFrequency: 35.7%

Maximum Population Year

Array Counting Prefix Sum

#529

Rank

#2094MediumFrequency: 35.6%

Remove Stones to Minimize the Total

#530

Rank

#1995MediumFrequency: 35.5%

Finding Pairs With a Certain Sum

Array Hash Table Design

#531

Rank

#421MediumFrequency: 35.3%

Maximum XOR of Two Numbers in an Array

Array Hash Table Bit Manipulation Trie

#532

Rank

#3949MediumFrequency: 35.1%

Minimum Number of Primes to Sum to Target

Array Math Dynamic Programming Number Theory

#533

Rank

#325MediumFrequency: 35%

Maximum Size Subarray Sum Equals k

#534

Rank

#932EasyFrequency: 35%

Monotonic Array

#535

Rank

#941EasyFrequency: 35%

Sort Array By Parity

#536

Rank

#2189HardFrequency: 35%

Maximum Path Quality of a Graph

Array Backtracking Graph Theory

#537

Rank

#1003MediumFrequency: 34.8%

Minimum Area Rectangle II

Array Hash Table Math Geometry

#538

Rank

#452MediumFrequency: 34.3%

Minimum Number of Arrows to Burst Balloons

#539

Rank

#722MediumFrequency: 34.3%

Remove Comments

#540

Rank

#823HardFrequency: 34.3%

Split Array With Same Average

Array Hash Table Math Dynamic Programming Bit Manipulation Meet in the Middle Bitmask

#541

Rank

#1428MediumFrequency: 34.3%

Jump Game III

Array Depth-First Search Breadth-First Search

#542

Rank

#2308EasyFrequency: 34.3%

Divide Array Into Equal Pairs

Array Hash Table Bit Manipulation Counting

#543

Rank

#2162HardFrequency: 34.2%

Partition Array Into Two Arrays to Minimize Sum Difference

Array Two Pointers Binary Search Dynamic Programming Bit Manipulation Meet in the Middle Sorting Ordered Set Bitmask

#544

Rank

#2295HardFrequency: 34.2%

Minimum Time to Finish the Race

#545

Rank

#967MediumFrequency: 34.2%

Minimum Falling Path Sum

#546

Rank

#2035MediumFrequency: 34.2%

Count Sub Islands

Array Depth-First Search Breadth-First Search Union-Find Matrix

#547

Rank

#869HardFrequency: 34.2%

Similar String Groups

Array Hash Table String Depth-First Search Breadth-First Search Union-Find

#548

Rank

#377MediumFrequency: 33.7%

Combination Sum IV

#549

Rank

#1256EasyFrequency: 33.7%

Rank Transform of an Array

#550

Rank

#862MediumFrequency: 33.7%

Find And Replace in String

#551

Rank

#1925MediumFrequency: 33.5%

Count Nice Pairs in an Array

#552

Rank

#2118MediumFrequency: 33.5%

Maximum Earnings From Taxi

Array Hash Table Binary Search Dynamic Programming Sorting

#553

Rank

#2307HardFrequency: 33.5%

Replace Non-Coprime Numbers in Array

Array Math Stack Number Theory Least Common Multiple Greatest Common Divisor

#554

Rank

#3095MediumFrequency: 33.5%

Maximum Number of Alloys

#555

Rank

#2681HardFrequency: 33.3%

Put Marbles in Bags

#556

Rank

#463EasyFrequency: 33.3%

Island Perimeter

Array Depth-First Search Breadth-First Search Matrix

#557

Rank

#2272HardFrequency: 33.3%

Maximum Good People Based on Statements

Array Backtracking Bit Manipulation Enumeration

#558

Rank

#1382EasyFrequency: 33.3%

Calculate Amount Paid in Taxes

#559

Rank

#2538HardFrequency: 33.3%

Minimum Cost to Make Array Equal

Array Binary Search Greedy Sorting Prefix Sum

#560

Rank

#1380MediumFrequency: 33.3%

Number of Closed Islands

Array Depth-First Search Breadth-First Search Union-Find Matrix

#561

Rank

#1272MediumFrequency: 33.3%

Invalid Transactions

#562

Rank

#315HardFrequency: 33.1%

Count of Smaller Numbers After Self

Array Binary Search Divide and Conquer Binary Indexed Tree Segment Tree Merge Sort Ordered Set Treap

#563

Rank

#1791EasyFrequency: 33.1%

Richest Customer Wealth

#564

Rank

#3610EasyFrequency: 33.1%

Find X-Sum of All K-Long Subarrays I

Array Hash Table Sliding Window Heap (Priority Queue)

#565

Rank

#247MediumFrequency: 33%

Strobogrammatic Number II

Array String Recursion

#566

Rank

#3092MediumFrequency: 33%

Minimum Moves to Spread Stones Over Grid

Array Dynamic Programming Backtracking Bit Manipulation Matrix Bitmask

#567

Rank

#616MediumFrequency: 33%

Add Bold Tag in String

Array Hash Table String Trie String Matching Aho–Corasick Algorithm

#568

Rank

#1477MediumFrequency: 33%

Product of the Last K Numbers

Array Math Design Data Stream Prefix Sum

#569

Rank

#1121MediumFrequency: 33%

Partition Array for Maximum Sum

#570

Rank

#810MediumFrequency: 32.8%

Valid Tic-Tac-Toe State

#571

Rank

#1072MediumFrequency: 32.8%

Next Greater Node In Linked List

Array Linked List Stack Monotonic Stack

#572

Rank

#2417MediumFrequency: 32.4%

The Latest Time to Catch a Bus

#573

Rank

#3430MediumFrequency: 32.4%

Count Days Without Meetings

#574

Rank

#1497MediumFrequency: 32.4%

Design a Stack With Increment Operation

Array Stack Design

#575

Rank

#3321EasyFrequency: 32.4%

Type of Triangle

Array Math Sorting Polygons

#576

Rank

#3838MediumFrequency: 32.4%

Path Existence Queries in a Graph I

Array Hash Table Binary Search Union-Find Graph Theory

#577

Rank

#414EasyFrequency: 32.3%

Third Maximum Number

#578

Rank

#974MediumFrequency: 32.3%

Reorder Data in Log Files

Array String Sorting

#579

Rank

#2265MediumFrequency: 32.3%

Partition Array According to Given Pivot

#580

Rank

#2919HardFrequency: 32.3%

Maximum Number of Groups With Increasing Length

Array Math Binary Search Greedy Sorting

#581

Rank

#1771MediumFrequency: 32.3%

Sell Diminishing-Valued Colored Balls

Array Math Binary Search Greedy Sorting Heap (Priority Queue)

#582

Rank

#4230MediumFrequency: 32.3%

Longest Arithmetic Sequence After Changing At Most One Element

#583

Rank

#1487MediumFrequency: 32.1%

Cinema Seat Allocation

Array Hash Table Greedy Bit Manipulation

#584

Rank

#2012MediumFrequency: 32.1%

Process Tasks Using Servers

#585

Rank

#444MediumFrequency: 31.8%

Sequence Reconstruction

Array Graph Theory Topological Sort Directed Acyclic Graph

#586

Rank

#1895MediumFrequency: 31.8%

Minimum Number of Operations to Move All Balls to Each Box

#587

Rank

#2868MediumFrequency: 31.8%

Continuous Subarrays

Array Queue Sliding Window Heap (Priority Queue)Ordered Set Monotonic Queue

#588

Rank

#883MediumFrequency: 31.8%

Car Fleet

Array Stack Sorting Monotonic Stack

#589

Rank

#898EasyFrequency: 31.8%

Transpose Matrix

#590

Rank

#3265MediumFrequency: 31.8%

Maximum Good Subarray Sum

#591

Rank

#3903MediumFrequency: 31.8%

Inverse Coin Change

#592

Rank

#396MediumFrequency: 31.3%

Rotate Function

#593

Rank

#1669HardFrequency: 31.3%

Minimum Cost to Cut a Stick

#594

Rank

#3733HardFrequency: 31.3%

Length of Longest V-Shaped Diagonal Segment

Array Dynamic Programming Memoization Matrix

#595

Rank

#4000MediumFrequency: 31.3%

Count Bowl Subarrays

#596

Rank

#3851HardFrequency: 31.3%

Find Sum of Array Product of Magical Sequences

Array Math Dynamic Programming Bit Manipulation Combinatorics Bitmask

#597

Rank

#870MediumFrequency: 31.3%

Magic Squares In Grid

Array Hash Table Math Matrix

#598

Rank

#1947HardFrequency: 31.3%

Number of Different Subsequences GCDs

Array Math Counting Number Theory Euclidean Algorithm Greatest Common Divisor

#599

Rank

#1621MediumFrequency: 31.3%

Number of Subsequences That Satisfy the Given Sum Condition

#600

Rank

#2730MediumFrequency: 31.3%

Maximum OR

Array Greedy Bit Manipulation Prefix Sum

#601

Rank

#2751MediumFrequency: 31.3%

Sliding Subarray Beauty

#602

Rank

#1130MediumFrequency: 31.3%

Last Stone Weight II

Array Dynamic Programming Knapsack Problem 0-1 Knapsack

#603

Rank

#1095MediumFrequency: 31.3%

Two City Scheduling

Array Greedy Sorting Hungarian Algorithm Successive Shortest Path Algorithm

#604

Rank

#1849MediumFrequency: 31.3%

Maximum Absolute Sum of Any Subarray

#605

Rank

#1047EasyFrequency: 31.3%

Maximize Sum Of Array After K Negations

#606

Rank

#327HardFrequency: 31.3%

Count of Range Sum

Array Binary Search Divide and Conquer Binary Indexed Tree Segment Tree Merge Sort Ordered Set Treap

#607

Rank

#453MediumFrequency: 31.3%

Minimum Moves to Equal Array Elements

#608

Rank

#1329EasyFrequency: 31.3%

Minimum Cost to Move Chips to The Same Position

Array Math Greedy

#609

Rank

#4033MediumFrequency: 31.3%

Longest Subsequence With Non-Zero Bitwise XOR

#610

Rank

#1335MediumFrequency: 31.1%

Maximum Candies Allocated to K Children

#611

Rank

#2139MediumFrequency: 31.1%

Detect Squares

Array Hash Table Design Counting Data Stream

#612

Rank

#2545HardFrequency: 31.1%

Height of Binary Tree After Subtree Removal Queries

Array Tree Depth-First Search Breadth-First Search Binary Tree

#613

Rank

#861EasyFrequency: 31.1%

Flipping an Image

Array Two Pointers Bit Manipulation Matrix Simulation

#614

Rank

#502HardFrequency: 31.1%

IPO

#615

Rank

#1062EasyFrequency: 31.1%

Partition Array Into Three Parts With Equal Sum

#616

Rank

#1449MediumFrequency: 31.1%

Print Words Vertically

#617

Rank

#1700MediumFrequency: 31.1%

Minimum Time to Make Rope Colorful

Array String Dynamic Programming Greedy

#618

Rank

#1802EasyFrequency: 31.1%

Number of Students Unable to Eat Lunch

Array Stack Queue Simulation

#619

Rank

#1805HardFrequency: 31.1%

Minimum Adjacent Swaps for K Consecutive Ones

Array Greedy Sliding Window Prefix Sum

#620

Rank

#2016MediumFrequency: 31.1%

Reduction Operations to Make the Array Elements Equal

#621

Rank

#2155MediumFrequency: 31.1%

Find Missing Observations

Array Math Simulation

#622

Rank

#2634EasyFrequency: 31.1%

Minimum Common Value

Array Hash Table Two Pointers Binary Search

#623

Rank

#2823MediumFrequency: 31.1%

The Knight’s Tour

Array Backtracking Matrix

#624

Rank

#2902EasyFrequency: 31.1%

Max Pair Sum in an Array

#625

Rank

#3236EasyFrequency: 31.1%

Smallest Missing Integer Greater Than Sequential Prefix Sum

#626

Rank

#3318MediumFrequency: 31.1%

Maximum Number of Operations With the Same Score II

Array Dynamic Programming Memoization

#627

Rank

#3659MediumFrequency: 31.1%

Count Paths With the Given XOR Value

Array Dynamic Programming Bit Manipulation Matrix

#628

Rank

#1781EasyFrequency: 30.7%

Check If Two String Arrays are Equivalent

#629

Rank

#1522HardFrequency: 30.4%

Stone Game III

Array Math Dynamic Programming Minimax Game Theory Zero-Sum Game

#630

Rank

#1833EasyFrequency: 30.4%

Find the Highest Altitude

#631

Rank

#2117MediumFrequency: 30.4%

Find Original Array From Doubled Array

#632

Rank

#2617HardFrequency: 30.4%

Time Taken to Cross the Door

Array Queue Simulation

#633

Rank

#271MediumFrequency: 30.4%

Encode and Decode Strings

Array String Design

#634

Rank

#1977HardFrequency: 30.4%

Minimum Interval to Include Each Query

Array Binary Search Sweep Line Sorting Heap (Priority Queue)

#635

Rank

#304MediumFrequency: 30.4%

Range Sum Query 2D - Immutable

Array Design Matrix Prefix Sum

#636

Rank

#561EasyFrequency: 30.2%

Array Partition

Array Greedy Sorting Counting Sort

#637

Rank

#1231EasyFrequency: 30.2%

Replace Elements with Greatest Element on Right Side

#638

Rank

#1694MediumFrequency: 30.2%

Make Sum Divisible by P

#639

Rank

#1917MediumFrequency: 30.2%

Maximum Average Pass Ratio

#640

Rank

#1392EasyFrequency: 29.7%

Find the Difference of Two Arrays

#641

Rank

#1468EasyFrequency: 29.7%

Check If N and Its Double Exist

Array Hash Table Two Pointers Binary Search Sorting

#642

Rank

#2048EasyFrequency: 29.7%

Build Array from Permutation

#643

Rank

#909MediumFrequency: 29.7%

Stone Game

Array Math Dynamic Programming Minimax Game Theory Zero-Sum Game

#644

Rank

#691HardFrequency: 29.5%

Stickers to Spell Word

Array Hash Table String Dynamic Programming Backtracking Bit Manipulation Memoization Bitmask

#645

Rank

#1031EasyFrequency: 29.5%

Add to Array-Form of Integer

#646

Rank

#1395EasyFrequency: 29.5%

Minimum Time Visiting All Points

#647

Rank

#3334EasyFrequency: 29.5%

Apple Redistribution into Boxes

#648

Rank

#2433EasyFrequency: 29.5%

Best Poker Hand

#649

Rank

#1582MediumFrequency: 29.5%

Design Browser History

Array Linked List Stack Design Doubly-Linked List Data Stream

#650

Rank

#158HardFrequency: 29.5%

Read N Characters Given read4 II - Call Multiple Times

Array Simulation Interactive

#651

Rank

#839MediumFrequency: 29.5%

Short Encoding of Words

#652

Rank

#731MediumFrequency: 29.5%

My Calendar II

Array Binary Search Design Segment Tree Prefix Sum Ordered Set

#653

Rank

#2521HardFrequency: 29.5%

Paths in Matrix Whose Sum Is Divisible by K

#654

Rank

#1491MediumFrequency: 29.3%

Number of Times Binary String Is Prefix-Aligned

#655

Rank

#1651EasyFrequency: 29.3%

Shuffle String

#656

Rank

#1742EasyFrequency: 29.3%

Widest Vertical Area Between Two Points Containing No Points

#657

Rank

#2246HardFrequency: 29.3%

Maximum Employees to Be Invited to a Meeting

Array Dynamic Programming Depth-First Search Graph Theory Topological Sort Kosaraju's Algorithm Tarjan's SCC Algorithm

#658

Rank

#2247MediumFrequency: 29.3%

Number of Unique Flavors After Sharing K Candies

#659

Rank

#3454HardFrequency: 29.3%

Minimum Operations to Make Array Equal to Target

Array Dynamic Programming Stack Greedy Monotonic Stack

#660

Rank

#4151HardFrequency: 29.3%

Maximum Subgraph Score in a Tree

#661

Rank

#661EasyFrequency: 29.1%

Image Smoother

#662

Rank

#892HardFrequency: 29.1%

Shortest Subarray with Sum at Least K

Array Binary Search Queue Sliding Window Heap (Priority Queue)Prefix Sum Monotonic Queue

#663

Rank

#1227EasyFrequency: 29.1%

Number of Equivalent Domino Pairs

#664

Rank

#1476EasyFrequency: 29.1%

Count Negative Numbers in a Sorted Matrix

Array Binary Search Matrix

#665

Rank

#1993EasyFrequency: 29.1%

Sum of All Subset XOR Totals

Array Math Backtracking Bit Manipulation Combinatorics Enumeration

#666

Rank

#2333MediumFrequency: 29.1%

Count Number of Rectangles Containing Each Point

Array Hash Table Binary Search Binary Indexed Tree Sorting

#667

Rank

#2473MediumFrequency: 29.1%

Max Sum of a Pair With Equal Sum of Digits

Array Hash Table Sorting Heap (Priority Queue)

#668

Rank

#2490HardFrequency: 29.1%

Maximum Number of Books You Can Take

Array Dynamic Programming Stack Monotonic Stack

#669

Rank

#2737EasyFrequency: 29.1%

Row With Maximum Ones

#670

Rank

#3764MediumFrequency: 29.1%

Maximum Sum With at Most K Elements

Array Greedy Sorting Heap (Priority Queue)Matrix

#671

Rank

#2289MediumFrequency: 29.1%

Minimum Operations to Make the Array Alternating

#672

Rank

#4061HardFrequency: 29.1%

Minimum Swaps to Avoid Forbidden Values

#673

Rank

#3263EasyFrequency: 29.1%

Divide an Array Into Subarrays With Minimum Cost I

Array Sorting Enumeration

#674

Rank

#4242MediumFrequency: 29.1%

Sum of GCD of Formed Pairs

Array Math Two Pointers Sorting Simulation Number Theory

#675

Rank

#830EasyFrequency: 28.9%

Largest Triangle Area

Array Math Geometry Polygons

#676

Rank

#1185HardFrequency: 28.9%

Find in Mountain Array

Array Binary Search Interactive Ternary Search

#677

Rank

#1350MediumFrequency: 28.9%

Remove Sub-Folders from the Filesystem

Array String Depth-First Search Trie

#678

Rank

#3501MediumFrequency: 28.9%

Delete Nodes From Linked List Present in Array

Array Hash Table Linked List

#679

Rank

#350EasyFrequency: 28.9%

Intersection of Two Arrays II

Array Hash Table Two Pointers Binary Search Sorting

#680

Rank

#1168EasyFrequency: 28.9%

Duplicate Zeros

#681

Rank

#1330MediumFrequency: 28.9%

Longest Arithmetic Subsequence of Given Difference

#682

Rank

#1422MediumFrequency: 28.9%

Divide Array in Sets of K Consecutive Numbers

#683

Rank

#1482EasyFrequency: 28.9%

How Many Numbers Are Smaller Than the Current Number

Array Hash Table Sorting Counting Sort

#684

Rank

#1635EasyFrequency: 28.9%

Number of Good Pairs

#685

Rank

#3622MediumFrequency: 28.9%

Maximum Frequency of an Element After Performing Operations I

Array Binary Search Sliding Window Sorting Prefix Sum

#686

Rank

#4098MediumFrequency: 28.9%

Longest Non-Decreasing Subarray After Replacing at Most One Element

#687

Rank

#324MediumFrequency: 28.1%

Wiggle Sort II

Array Divide and Conquer Greedy Sorting Quickselect

#688

Rank

#780MediumFrequency: 28.1%

Max Chunks To Make Sorted

Array Stack Greedy Sorting Monotonic Stack

#689

Rank

#1049MediumFrequency: 28.1%

Minimum Domino Rotations For Equal Row

#690

Rank

#2378MediumFrequency: 28.1%

Sender With Largest Word Count

#691

Rank

#2891MediumFrequency: 28.1%

Maximum Beauty of an Array After Applying Operation

Array Binary Search Sliding Window Sorting

#692

Rank

#119EasyFrequency: 28.1%

Pascal's Triangle II

#693

Rank

#406MediumFrequency: 28.1%

Queue Reconstruction by Height

Array Binary Indexed Tree Segment Tree Sorting

#694

Rank

#539MediumFrequency: 28.1%

Minimum Time Difference

Array Math String Sorting

#695

Rank

#3646HardFrequency: 28.1%

Sum of Good Subsequences

#696

Rank

#1421EasyFrequency: 28.1%

Find Numbers with Even Number of Digits

#697

Rank

#3647MediumFrequency: 28.1%

Zero Array Transformation III

Array Two Pointers Greedy Sorting Heap (Priority Queue)Prefix Sum

#698

Rank

#216MediumFrequency: 27.8%

Combination Sum III

#699

Rank

#475MediumFrequency: 27.8%

Heaters

#700

Rank

#517HardFrequency: 27.8%

Super Washing Machines

#701

Rank

#646MediumFrequency: 27.8%

Maximum Length of Pair Chain

Array Dynamic Programming Greedy Sorting Longest Increasing Subsequence

#702

Rank

#682EasyFrequency: 27.8%

Baseball Game

#703

Rank

#1222MediumFrequency: 27.8%

Remove Covered Intervals

#704

Rank

#1571HardFrequency: 27.8%

Allocate Mailboxes

Array Math Dynamic Programming Sorting

#705

Rank

#1768MediumFrequency: 27.8%

Design an Expression Tree With Evaluate Function

Array Math Stack Tree Design Binary Tree

#706

Rank

#1813MediumFrequency: 27.8%

Maximum Erasure Value

#707

Rank

#2054MediumFrequency: 27.8%

The Number of the Smallest Unoccupied Chair

Array Hash Table Heap (Priority Queue)

#708

Rank

#2387MediumFrequency: 27.8%

Partition Array Such That Maximum Difference Is K

#709

Rank

#2833MediumFrequency: 27.8%

Count Zero Request Servers

Array Hash Table Sliding Window Sorting

#710

Rank

#3819MediumFrequency: 27.8%

Count Covered Buildings

#711

Rank

#3269MediumFrequency: 27.8%

Number of Subarrays That Match a Pattern I

Array Rolling Hash String Matching Hash Function

#712

Rank

#1239MediumFrequency: 27.8%

Largest 1-Bordered Square

#713

Rank

#1223HardFrequency: 27.8%

Graph Connectivity With Threshold

Array Math Union-Find Number Theory

#714

Rank

#914MediumFrequency: 27.8%

Random Point in Non-overlapping Rectangles

Array Math Binary Search Reservoir Sampling Prefix Sum Ordered Set Randomized

#715

Rank

#3933MediumFrequency: 27.8%

Minimum Jumps to Reach End via Prime Teleportation

Array Hash Table Math Breadth-First Search Number Theory

#716

Rank

#2111MediumFrequency: 27.8%

Binary Searchable Numbers in an Unsorted Array

Array Binary Search Stack Monotonic Stack

#717

Rank

#1744HardFrequency: 27.8%

Number of Ways to Form a Target String Given a Dictionary

#718

Rank

#2135HardFrequency: 27.7%

Maximum Number of Ways to Partition an Array

Array Hash Table Counting Enumeration Prefix Sum

#719

Rank

#2598EasyFrequency: 27.7%

Shortest Distance to Target String in a Circular Array

#720

Rank

#289MediumFrequency: 27.7%

Game of Life

#721

Rank

#1604MediumFrequency: 27.7%

Least Number of Unique Integers after K Removals

Array Hash Table Greedy Sorting Counting

#722

Rank

#353MediumFrequency: 27.7%

Design Snake Game

Array Hash Table Design Queue Simulation

#723

Rank

#779HardFrequency: 27.7%

Max Chunks To Make Sorted II

Array Stack Greedy Sorting Monotonic Stack

#724

Rank

#2485MediumFrequency: 27.7%

Finding the Number of Visible Mountains

Array Stack Sorting Monotonic Stack

#725

Rank

#630HardFrequency: 27.7%

Course Schedule III

#726

Rank

#3171MediumFrequency: 27.7%

Minimum Equal Sum of Two Arrays After Replacing Zeros

#727

Rank

#519MediumFrequency: 27.3%

Widest Pair of Indices With Equal Range Sum

#728

Rank

#654MediumFrequency: 27.3%

Maximum Binary Tree

Array Divide and Conquer Stack Tree Monotonic Stack Binary Tree Cartesian Tree

#729

Rank

#1139MediumFrequency: 27.3%

Previous Permutation With One Swap

#730

Rank

#1143MediumFrequency: 27.3%

Find Smallest Common Element in All Rows

Array Hash Table Binary Search Matrix Counting

#731

Rank

#1183MediumFrequency: 27.3%

Statistics from a Large Sample

Array Math Probability and Statistics

#732

Rank

#1201MediumFrequency: 27.3%

Delete Tree Nodes

Array Tree Depth-First Search Breadth-First Search DP on Trees

#733

Rank

#1202HardFrequency: 27.3%

Palindrome Removal

#734

Rank

#1230MediumFrequency: 27.3%

Maximum of Absolute Value Expression

#735

Rank

#1348HardFrequency: 27.3%

Maximum Score Of Spliced Array

#736

Rank

#1355MediumFrequency: 27.3%

Minimum Deletions to Make Array Beautiful

Array Stack Greedy

#737

Rank

#1569HardFrequency: 27.3%

Max Dot Product of Two Subsequences

Array Dynamic Programming Longest Common Subsequence

#738

Rank

#1799HardFrequency: 27.3%

Minimum Incompatibility

Array Hash Table Dynamic Programming Bit Manipulation Bitmask

#739

Rank

#1950EasyFrequency: 27.3%

Sign of the Product of an Array

#740

Rank

#2142MediumFrequency: 27.3%

Average Height of Buildings in Each Segment

Array Sorting Heap (Priority Queue)Prefix Sum

#741

Rank

#2242MediumFrequency: 27.3%

Subsequence of Size K With the Largest Even Sum

#742

Rank

#2310MediumFrequency: 27.3%

Minimum Operations to Halve Array Sum

#743

Rank

#2471MediumFrequency: 27.3%

Minimum Amount of Time to Collect Garbage

#744

Rank

#2524EasyFrequency: 27.3%

Largest Positive Integer That Exists With Its Negative

#745

Rank

#2674MediumFrequency: 27.3%

Make the Prefix Sum Non-negative

#746

Rank

#2693MediumFrequency: 27.3%

Maximum Price to Fill a Bag

#747

Rank

#3228MediumFrequency: 27.3%

Maximum Size of a Set After Removals

#748

Rank

#3304MediumFrequency: 27.3%

Maximum Subtree of the Same Color

#749

Rank

#3315HardFrequency: 27.3%

Maximum Number of Intersections on the Chart

Array Hash Table Math Binary Indexed Tree Geometry Sweep Line Sorting

#750

Rank

#3320EasyFrequency: 27.3%

Maximum Number of Operations With the Same Score I

#751

Rank

#3362HardFrequency: 27.3%

Find the Median of the Uniqueness Array

Array Hash Table Binary Search Sliding Window

#752

Rank

#3390MediumFrequency: 27.3%

Minimum Rectangles to Cover Points

#753

Rank

#3492MediumFrequency: 27.3%

Count Submatrices With Equal Frequency of X and Y

#754

Rank

#1586MediumFrequency: 27.3%

Longest Subarray of 1's After Deleting One Element

#755

Rank

#934MediumFrequency: 27.3%

Bitwise ORs of Subarrays

Array Dynamic Programming Bit Manipulation

#756

Rank

#1514EasyFrequency: 27.3%

Minimum Value to Get Positive Step by Step Sum

#757

Rank

#4009EasyFrequency: 27.3%

Bitwise OR of Even Numbers in an Array

Array Bit Manipulation Simulation

#758

Rank

#4083MediumFrequency: 27.3%

Stable Subarrays With Equal Boundary and Interior Sum

#759

Rank

#4222HardFrequency: 27.3%

Count Good Subarrays

Array Stack Bit Manipulation Monotonic Stack

#760

Rank

#550MediumFrequency: 27.3%

Shortest Path to Get Food

#761

Rank

#1776MediumFrequency: 27.2%

Minimum Operations to Reduce X to Zero

Array Hash Table Binary Search Sliding Window Prefix Sum

#762

Rank

#1073MediumFrequency: 27.2%

Number of Enclaves

Array Depth-First Search Breadth-First Search Union-Find Matrix

#763

Rank

#1616MediumFrequency: 27.2%

Minimum Difference Between Largest and Smallest Value in Three Moves

#764

Rank

#3657MediumFrequency: 27.2%

Check if Grid can be Cut into Sections

#765

Rank

#3743MediumFrequency: 27.2%

Reschedule Meetings for Maximum Free Time I

Array Greedy Sliding Window

#766

Rank

#594EasyFrequency: 27.2%

Longest Harmonious Subsequence

Array Hash Table Sliding Window Sorting Counting

#767

Rank

#554MediumFrequency: 26.7%

Brick Wall

#768

Rank

#674EasyFrequency: 26.7%

Longest Continuous Increasing Subsequence

#769

Rank

#1149EasyFrequency: 26.7%

Intersection of Three Sorted Arrays

Array Hash Table Binary Search Counting

#770

Rank

#1360MediumFrequency: 26.7%

Maximum Length of a Concatenated String with Unique Characters

Array String Backtracking Bit Manipulation

#771

Rank

#1848EasyFrequency: 26.7%

Sum of Unique Elements

#772

Rank

#1959MediumFrequency: 26.7%

Minimum Path Cost in a Hidden Grid

Array Depth-First Search Breadth-First Search Graph Theory Heap (Priority Queue)Matrix Interactive Shortest Path

#773

Rank

#2316EasyFrequency: 26.7%

Count Hills and Valleys in an Array

#774

Rank

#3707MediumFrequency: 26.7%

Find the Most Common Response

#775

Rank

#260MediumFrequency: 26.5%

Single Number III

#776

Rank

#837EasyFrequency: 26.5%

Most Common Word

#777

Rank

#958EasyFrequency: 26.5%

Sort Array By Parity II

#778

Rank

#1044EasyFrequency: 26.5%

Find Common Characters

#779

Rank

#1679MediumFrequency: 26.5%

Shortest Subarray to be Removed to Make Array Sorted

Array Two Pointers Binary Search Stack Monotonic Stack

#780

Rank

#1798MediumFrequency: 26.5%

Max Number of K-Sum Pairs

#781

Rank

#1825HardFrequency: 26.5%

Find Minimum Time to Finish All Jobs

Array Dynamic Programming Backtracking Bit Manipulation Bitmask

#782

Rank

#1956MediumFrequency: 26.5%

Maximum Element After Decreasing and Rearranging

#783

Rank

#2015EasyFrequency: 26.5%

Determine Whether Matrix Can Be Obtained By Rotation

#784

Rank

#2116EasyFrequency: 26.5%

Count Number of Pairs With Absolute Difference K

#785

Rank

#2125HardFrequency: 26.5%

GCD Sort of an Array

Array Math Union-Find Sorting Number Theory Prime Factorization Euclidean Algorithm Greatest Common Divisor

#786

Rank

#2358MediumFrequency: 26.5%

Number of Ways to Split Array

#787

Rank

#2362MediumFrequency: 26.5%

Minimum Rounds to Complete All Tasks

#788

Rank

#2449HardFrequency: 26.5%

Maximum Number of Robots Within Budget

Array Binary Search Queue Sliding Window Heap (Priority Queue)Prefix Sum Monotonic Queue

#789

Rank

#2462HardFrequency: 26.5%

Find the K-Sum of an Array

#790

Rank

#3656EasyFrequency: 26.5%

Minimum Number of Operations to Make Elements in Array Distinct

#791

Rank

#3959MediumFrequency: 26.5%

Maximum Total from Optimal Activation Order

Array Two Pointers Greedy Sorting Heap (Priority Queue)

#792

Rank

#4294HardFrequency: 26.5%

Maximize Fixed Points After Deletions

#793

Rank

#474MediumFrequency: 26.3%

Ones and Zeroes

Array String Dynamic Programming Knapsack Problem 0-1 Knapsack

#794

Rank

#827MediumFrequency: 26.3%

Expressive Words

#795

Rank

#985MediumFrequency: 26.3%

Bag of Tokens

#796

Rank

#1364MediumFrequency: 26.3%

Tuple with Same Product

#797

Rank

#1628MediumFrequency: 26.3%

Count Submatrices With All Ones

Array Dynamic Programming Stack Matrix Monotonic Stack

#798

Rank

#2132EasyFrequency: 26.3%

Convert 1D Array Into 2D Array

#799

Rank

#2146MediumFrequency: 26.3%

Check if Word Can Be Placed In Crossword

Array Matrix Enumeration

#800

Rank

#2353HardFrequency: 26.3%

Maximum Score of a Node Sequence

Array Graph Theory Sorting Enumeration

#801

Rank

#3241MediumFrequency: 26.3%

Divide Array Into Arrays With Max Difference

#802

Rank

#3612EasyFrequency: 26.3%

Adjacent Increasing Subarrays Detection I

#803

Rank

#3699MediumFrequency: 26.3%

Count Special Subsequences

Array Hash Table Math Enumeration

#804

Rank

#3620MediumFrequency: 26.3%

Maximum Number of Distinct Elements After Operations

#805

Rank

#748EasyFrequency: 25.4%

Largest Number At Least Twice of Others

#806

Rank

#1483MediumFrequency: 25.4%

Rank Teams by Votes

Array Hash Table String Sorting Counting

#807

Rank

#1552MediumFrequency: 25.4%

Build an Array With Stack Operations

#808

Rank

#1792MediumFrequency: 25.4%

Find the Most Competitive Subsequence

Array Stack Greedy Monotonic Stack

#809

Rank

#2320EasyFrequency: 25.4%

Find All K-Distant Indices in an Array

#810

Rank

#2322MediumFrequency: 25.4%

Number of Ways to Build Sturdy Brick Wall

#811

Rank

#318MediumFrequency: 25.4%

Maximum Product of Word Lengths

Array String Bit Manipulation

#812

Rank

#2526HardFrequency: 25.4%

Longest Increasing Subsequence II

Array Divide and Conquer Dynamic Programming Binary Indexed Tree Segment Tree Queue Monotonic Queue

#813

Rank

#506EasyFrequency: 25.4%

Relative Ranks

#814

Rank

#1325MediumFrequency: 25.4%

Path with Maximum Probability

Array Graph Theory Heap (Priority Queue)Shortest Path Dijkstra's Algorithm

#815

Rank

#2766MediumFrequency: 25.4%

Find the Prefix Common Array of Two Arrays

#816

Rank

#3429EasyFrequency: 25.4%

Special Array I

#817

Rank

#2448MediumFrequency: 25.4%

Count Number of Bad Pairs

#818

Rank

#1099MediumFrequency: 25.4%

Path With Maximum Minimum Value

Array Binary Search Depth-First Search Breadth-First Search Union-Find Heap (Priority Queue)Matrix Dijkstra's Algorithm

#819

Rank

#1741EasyFrequency: 25.3%

Sort Array by Increasing Frequency

#820

Rank

#2664MediumFrequency: 25.3%

Maximize Greatness of an Array

#821

Rank

#1952MediumFrequency: 25.3%

Minimum Sideway Jumps

#822

Rank

#2530MediumFrequency: 25.3%

Minimize Maximum of Array

Array Binary Search Dynamic Programming Greedy Prefix Sum

#823

Rank

#1612MediumFrequency: 25.3%

Avoid Flood in The City

Array Hash Table Binary Search Greedy Heap (Priority Queue)

#824

Rank

#3991MediumFrequency: 25.3%

Generate Schedule

Array Math Greedy

#825

Rank

#1052MediumFrequency: 25.3%

Campus Bikes

#826

Rank

#711HardFrequency: 25.1%

Number of Distinct Islands II

Array Hash Table Depth-First Search Breadth-First Search Union-Find Sorting Matrix Hash Function

#827

Rank

#926MediumFrequency: 25.1%

Find and Replace Pattern

#828

Rank

#1105MediumFrequency: 25.1%

Uncrossed Lines

Array Dynamic Programming Longest Common Subsequence

#829

Rank

#1288MediumFrequency: 25.1%

Maximum Subarray Sum with One Deletion

#830

Rank

#1381HardFrequency: 25.1%

Maximum Score Words Formed by Letters

Array Hash Table String Dynamic Programming Backtracking Bit Manipulation Counting Bitmask

#831

Rank

#1418MediumFrequency: 25.1%

Fair Distribution of Cookies

Array Dynamic Programming Backtracking Bit Manipulation Bitmask

#832

Rank

#1436MediumFrequency: 25.1%

Get Watched Videos by Your Friends

Array Hash Table Breadth-First Search Graph Theory Sorting

#833

Rank

#1620MediumFrequency: 25.1%

Check If Array Pairs Are Divisible by k

#834

Rank

#1961MediumFrequency: 25.1%

Maximum Ice Cream Bars

Array Greedy Sorting Counting Sort

#835

Rank

#2233MediumFrequency: 25.1%

Number of Smooth Descent Periods of a Stock

Array Math Two Pointers Dynamic Programming Sliding Window

#836

Rank

#3299MediumFrequency: 25.1%

Find the Maximum Number of Elements in Subset

#837

Rank

#3351MediumFrequency: 25.1%

Maximize Happiness of Selected Children

#838

Rank

#3894MediumFrequency: 25.1%

Maximize Y‑Sum by Picking a Triplet of Distinct X‑Values

Array Hash Table Greedy Sorting Heap (Priority Queue)

#839

Rank

#4154HardFrequency: 25.1%

Maximum Bitwise AND After Increment Operations

Array Greedy Bit Manipulation Sorting

#840

Rank

#4174HardFrequency: 25.1%

Lexicographically Maximum MEX Array

Array Hash Table Greedy Queue

#841

Rank

#4184MediumFrequency: 25.1%

Minimum Operations to Sort a Permutation

#842

Rank

#275MediumFrequency: 25.1%

H-Index II

#843

Rank

#673MediumFrequency: 25.1%

Number of Longest Increasing Subsequence

Array Dynamic Programming Binary Indexed Tree Segment Tree Longest Increasing Subsequence

#844

Rank

#769MediumFrequency: 25.1%

Largest Plus Sign

#845

Rank

#2917EasyFrequency: 25.1%

Count Pairs Whose Sum is Less than Target

#846

Rank

#154HardFrequency: 25%

Find Minimum in Rotated Sorted Array II

#847

Rank

#952MediumFrequency: 25%

Word Subsets

#848

Rank

#1927EasyFrequency: 25%

Maximum Ascending Subarray Sum

#849

Rank

#2690MediumFrequency: 25%

House Robber IV

Array Binary Search Dynamic Programming Greedy

#850

Rank

#3788EasyFrequency: 25%

Maximum Unique Subarray Sum After Deletion

#851

Rank

#2176HardFrequency: 24.6%

Parallel Courses III

Array Dynamic Programming Graph Theory Topological Sort Directed Acyclic Graph

#852

Rank

#2255MediumFrequency: 24.6%

Minimum Swaps to Group All 1's Together II

#853

Rank

#2616MediumFrequency: 24.6%

Maximal Score After Applying K Operations

#854

Rank

#413MediumFrequency: 24.6%

Arithmetic Slices

#855

Rank

#3107HardFrequency: 24.6%

Maximum Spending After Buying Items

Array Greedy Sorting Heap (Priority Queue)Matrix

#856

Rank

#2689HardFrequency: 24.6%

Rearranging Fruits

Array Hash Table Greedy Sort

#857

Rank

#978EasyFrequency: 24.6%

Valid Mountain Array

#858

Rank

#3211HardFrequency: 24.6%

Find Maximum Non-decreasing Array Length

Array Binary Search Dynamic Programming Stack Queue Monotonic Stack Prefix Sum Monotonic Queue

#859

Rank

#723MediumFrequency: 24.6%

Candy Crush

Array Two Pointers Matrix Simulation

#860

Rank

#2626MediumFrequency: 24.6%

Count the Number of Good Subarrays

#861

Rank

#280MediumFrequency: 24.6%

Wiggle Sort

#862

Rank

#1938EasyFrequency: 24.6%

Minimum Operations to Make the Array Increasing

#863

Rank

#3000MediumFrequency: 24.6%

Minimum Absolute Difference Between Elements With Constraint

Array Binary Search Ordered Set

#864

Rank

#3752MediumFrequency: 24.6%

Unit Conversion II

Array Math Depth-First Search Breadth-First Search Graph Theory

#865

Rank

#1117MediumFrequency: 24.6%

As Far from Land as Possible

Array Dynamic Programming Breadth-First Search Matrix

#866

Rank

#3225MediumFrequency: 24.6%

Length of Longest Subarray With at Most K Frequency

#867

Rank

#925MediumFrequency: 24.4%

Construct Binary Tree from Preorder and Postorder Traversal

Array Hash Table Divide and Conquer Tree Binary Tree

#868

Rank

#950EasyFrequency: 24.4%

X of a Kind in a Deck of Cards

Array Hash Table Math Counting Number Theory Euclidean Algorithm Greatest Common Divisor

#869

Rank

#965EasyFrequency: 24.4%

Unique Email Addresses

#870

Rank

#1242MediumFrequency: 24.4%

Matrix Block Sum

#871

Rank

#1396MediumFrequency: 24.4%

Count Servers that Communicate

Array Depth-First Search Breadth-First Search Union-Find Matrix Counting

#872

Rank

#1413MediumFrequency: 24.4%

Maximum Side Length of a Square with Sum Less than or Equal to Threshold

Array Binary Search Matrix Prefix Sum

#873

Rank

#1840MediumFrequency: 24.4%

Minimize Hamming Distance After Swap Operations

Array Depth-First Search Union-Find

#874

Rank

#1845MediumFrequency: 24.4%

Largest Submatrix With Rearrangements

Array Greedy Sorting Matrix

#875

Rank

#1934MediumFrequency: 24.4%

Evaluate the Bracket Pairs of a String

#876

Rank

#2055MediumFrequency: 24.4%

Describe the Painting

Array Hash Table Sorting Prefix Sum

#877

Rank

#2210EasyFrequency: 24.4%

Find Target Indices After Sorting Array

#878

Rank

#2292EasyFrequency: 24.4%

Counting Words With a Given Prefix

Array String String Matching

#879

Rank

#2550MediumFrequency: 24.4%

Words Within Two Edits of Dictionary

Array String Trie

#880

Rank

#2707EasyFrequency: 24.4%

Merge Two 2D Arrays by Summing Values

Array Hash Table Two Pointers

#881

Rank

#3278MediumFrequency: 24.4%

Find the Number of Ways to Place People I

Array Math Geometry Sorting Enumeration

#882

Rank

#2067MediumFrequency: 24.4%

Maximum Number of Points with Cost

#883

Rank

#3640HardFrequency: 24.4%

Maximum Frequency of an Element After Performing Operations II

Array Binary Search Sliding Window Sorting Prefix Sum

#884

Rank

#3674HardFrequency: 24.4%

Count Non-Decreasing Subarrays After K Operations

Array Stack Segment Tree Queue Sliding Window Monotonic Stack Monotonic Queue

#885

Rank

#1574EasyFrequency: 24.4%

Maximum Product of Two Elements in an Array

#886

Rank

#3773EasyFrequency: 24.4%

Minimum Pair Removal to Sort Array I

Array Hash Table Linked List Heap (Priority Queue)Simulation Doubly-Linked List Ordered Set

#887

Rank

#3822MediumFrequency: 24.4%

Fill a Special Grid

Array Divide and Conquer Matrix

#888

Rank

#512MediumFrequency: 23.6%

Maximum Alternating Subarray Sum

#889

Rank

#1042HardFrequency: 23.6%

Minimum Cost to Merge Stones

#890

Rank

#1074EasyFrequency: 23.6%

High Five

Array Hash Table Sorting Heap (Priority Queue)

#891

Rank

#1083EasyFrequency: 23.6%

Two Sum Less Than K

#892

Rank

#1140MediumFrequency: 23.6%

Distant Barcodes

Array Hash Table Greedy Sorting Heap (Priority Queue)Counting

#893

Rank

#1463EasyFrequency: 23.6%

The K Weakest Rows in a Matrix

Array Binary Search Sorting Heap (Priority Queue)Matrix

#894

Rank

#2047MediumFrequency: 23.6%

Find a Peak Element II

Array Binary Search Matrix

#895

Rank

#2051HardFrequency: 23.6%

Longest Common Subpath

Array Binary Search Rolling Hash Suffix Array Hash Function Suffix Automaton Suffix Tree

#896

Rank

#2188MediumFrequency: 23.6%

Minimized Maximum of Products Distributed to Any Store

#897

Rank

#2244MediumFrequency: 23.6%

Number of Laser Beams in a Bank

Array Math String Matrix

#898

Rank

#2342MediumFrequency: 23.6%

Minimum Average Difference

#899

Rank

#2355MediumFrequency: 23.6%

Maximum Consecutive Floors Without Special Floors

#900

Rank

#2429MediumFrequency: 23.6%

Design a Food Rating System

Array Hash Table String Design Heap (Priority Queue)Ordered Set

#901

Rank

#2474MediumFrequency: 23.6%

Minimum Adjacent Swaps to Make a Valid Array

#902

Rank

#2497MediumFrequency: 23.6%

Maximum Matching of Players With Trainers

#903

Rank

#2498MediumFrequency: 23.6%

Smallest Subarrays With Maximum Bitwise OR

Array Binary Search Bit Manipulation Sliding Window

#904

Rank

#2884HardFrequency: 23.6%

Length of the Longest Valid Substring

Array Hash Table String Sliding Window

#905

Rank

#2979MediumFrequency: 23.6%

Maximize the Profit as the Salesman

Array Hash Table Binary Search Dynamic Programming Sorting

#906

Rank

#3094MediumFrequency: 23.6%

Minimum Number of Operations to Make Array Empty

#907

Rank

#3363MediumFrequency: 23.6%

Most Frequent IDs

Array Hash Table Heap (Priority Queue)Ordered Set

#908

Rank

#2089MediumFrequency: 23.6%

Maximum Matrix Sum

Array Greedy Matrix

#909

Rank

#2164MediumFrequency: 23.6%

Two Best Non-Overlapping Events

Array Binary Search Dynamic Programming Sorting Heap (Priority Queue)

#910

Rank

#3920HardFrequency: 23.6%

Minimum Stability Factor of Array

Array Math Binary Search Greedy Segment Tree Number Theory

#911

Rank

#4079MediumFrequency: 23.6%

Maximum Capacity Within Budget

#912

Rank

#4301MediumFrequency: 23.6%

Minimize Array Sum Using Divisible Replacements

Array Hash Table Math Greedy Number Theory

#913

Rank

#157EasyFrequency: 23.4%

Read N Characters Given Read4

Array Simulation Interactive

#914

Rank

#746HardFrequency: 23.4%

Prefix and Suffix Search

Array Hash Table String Design Trie

#915

Rank

#819HardFrequency: 23.4%

Minimum Swaps To Make Sequences Increasing

#916

Rank

#1221EasyFrequency: 23.4%

Element Appearing More Than 25% In Sorted Array

#917

Rank

#1459MediumFrequency: 23.4%

Apply Discount Every n Orders

Array Hash Table Design

#918

Rank

#1550HardFrequency: 23.4%

Find the Kth Smallest Sum of a Matrix With Sorted Rows

Array Binary Search Heap (Priority Queue)Matrix

#919

Rank

#1819MediumFrequency: 23.4%

Construct the Lexicographically Largest Valid Sequence

#920

Rank

#1899EasyFrequency: 23.4%

Count Items Matching a Rule

#921

Rank

#1980EasyFrequency: 23.4%

Faulty Sensor

#922

Rank

#2639EasyFrequency: 23.4%

Separate the Digits in an Array

#923

Rank

#3955HardFrequency: 23.4%

Threshold Majority Queries

Array Hash Table Binary Search Divide and Conquer Counting Prefix Sum

#924

Rank

#879MediumFrequency: 23.3%

Maximize Distance to Closest Person

#925

Rank

#981EasyFrequency: 23.3%

Delete Columns to Make Sorted

Array String Longest Increasing Subsequence

#926

Rank

#2101HardFrequency: 23.3%

Last Day Where You Can Still Cross

Array Binary Search Depth-First Search Breadth-First Search Union-Find Matrix

#927

Rank

#308MediumFrequency: 23.3%

Range Sum Query 2D - Mutable

Array Design Binary Indexed Tree Segment Tree Matrix Sqrt Decomposition

#928

Rank

#2375HardFrequency: 23.3%

Minimum Obstacle Removal to Reach Corner

Array Breadth-First Search Graph Theory Heap (Priority Queue)Matrix Shortest Path 0-1 BFS Dijkstra's Algorithm

#929

Rank

#876MediumFrequency: 23.3%

Hand of Straights

#930

Rank

#3490MediumFrequency: 23.3%

Find the Maximum Length of Valid Subsequence I

#931

Rank

#1704EasyFrequency: 23.3%

Special Positions in a Binary Matrix

#932

Rank

#3603HardFrequency: 23.3%

Check if DFS Strings Are Palindromes

Array Hash Table String Tree Depth-First Search Hash Function

#933

Rank

#3619MediumFrequency: 23.3%

Adjacent Increasing Subarrays Detection II

#934

Rank

#3741MediumFrequency: 23.3%

Reschedule Meetings for Maximum Free Time II

Array Greedy Enumeration

#935

Rank

#4107EasyFrequency: 23.3%

Find Missing Elements

#936

Rank

#2478MediumFrequency: 22.5%

Longest Nice Subarray

Array Bit Manipulation Sliding Window

#937

Rank

#164MediumFrequency: 22.5%

Maximum Gap

Array Sorting Bucket Sort Radix Sort Pigeonhole Principle

#938

Rank

#2145MediumFrequency: 22.5%

Grid Game

#939

Rank

#878MediumFrequency: 22.5%

Shifting Letters

#940

Rank

#1006MediumFrequency: 22.5%

Vowel Spellchecker

#941

Rank

#1784HardFrequency: 22.5%

Minimum Initial Energy to Finish Tasks

#942

Rank

#363HardFrequency: 22.1%

Max Sum of Rectangle No Larger Than K

Array Binary Search Matrix Prefix Sum Ordered Set

#943

Rank

#393MediumFrequency: 22.1%

UTF-8 Validation

#944

Rank

#524MediumFrequency: 22.1%

Longest Word in Dictionary through Deleting

Array Two Pointers String Sorting

#945

Rank

#805MediumFrequency: 22.1%

Escape The Ghosts

#946

Rank

#947MediumFrequency: 22.1%

Online Election

Array Hash Table Binary Search Design

#947

Rank

#968MediumFrequency: 22.1%

Beautiful Array

Array Math Divide and Conquer

#948

Rank

#989HardFrequency: 22.1%

Largest Component Size by Common Factor

Array Hash Table Math Union-Find Number Theory Prime Factorization

#949

Rank

#992MediumFrequency: 22.1%

Delete Columns to Make Sorted II

Array String Greedy

#950

Rank

#1097HardFrequency: 22.1%

Stream of Characters

Array String Design Trie Data Stream Aho–Corasick Algorithm

#951

Rank

#1200MediumFrequency: 22.1%

Remove Interval

#952

Rank

#1257HardFrequency: 22.1%

Rank Transform of a Matrix

Array Union-Find Graph Theory Topological Sort Sorting Matrix

#953

Rank

#1447HardFrequency: 22.1%

Jump Game IV

#954

Rank

#1555HardFrequency: 22.1%

Number of Ways of Cutting a Pizza

Array Dynamic Programming Memoization Matrix Prefix Sum

#955

Rank

#1730EasyFrequency: 22.1%

Special Array With X Elements Greater Than or Equal X

#956

Rank

#1752MediumFrequency: 22.1%

Arithmetic Subarrays

#957

Rank

#1815HardFrequency: 22.1%

Checking Existence of Edge Length Limited Paths

Array Two Pointers Union-Find Graph Theory Sorting

#958

Rank

#1826HardFrequency: 22.1%

Maximum XOR With an Element From Array

Array Bit Manipulation Trie

#959

Rank

#2137EasyFrequency: 22.1%

Final Value of Variable After Performing Operations

#960

Rank

#2432MediumFrequency: 22.1%

Number of Zero-Filled Subarrays

#961

Rank

#2505HardFrequency: 22.1%

Number of Good Paths

Array Hash Table Tree Union-Find Graph Theory Sorting

#962

Rank

#2591MediumFrequency: 22.1%

Frog Jump II

#963

Rank

#2653MediumFrequency: 22.1%

Check if There is a Path With Equal Number of 0's And 1's

#964

Rank

#1206MediumFrequency: 22.1%

Corporate Flight Bookings

#965

Rank

#2215EasyFrequency: 22.1%

Finding 3-Digit Even Numbers

Array Hash Table Recursion Sorting Enumeration

#966

Rank

#2262MediumFrequency: 22.1%

Solving Questions With Brainpower

#967

Rank

#3790EasyFrequency: 22.1%

Fruits Into Baskets II

Array Binary Search Segment Tree Simulation Ordered Set

#968

Rank

#4047HardFrequency: 22.1%

Longest Balanced Subarray II

Array Hash Table Divide and Conquer Segment Tree Prefix Sum

#969

Rank

#2881EasyFrequency: 22%

Split Strings by Separator

#970

Rank

#906MediumFrequency: 22%

Walking Robot Simulation

#971

Rank

#2000MediumFrequency: 22%

Minimum Speed to Arrive on Time

#972

Rank

#737MediumFrequency: 22%

Sentence Similarity II

Array Hash Table String Depth-First Search Breadth-First Search Union-Find

#973

Rank

#553MediumFrequency: 21.9%

Optimal Division

#974

Rank

#994MediumFrequency: 21.9%

Prison Cells After N Days

Array Hash Table Math Bit Manipulation Floyd's Cycle Finding Algorithm

#975

Rank

#1138MediumFrequency: 21.9%

Grumpy Bookstore Owner

#976

Rank

#1386EasyFrequency: 21.9%

Shift 2D Grid

#977

Rank

#1524EasyFrequency: 21.9%

String Matching in an Array

Array String String Matching

#978

Rank

#1672MediumFrequency: 21.9%

Find the Index of the Large Integer

Array Binary Search Interactive

#979

Rank

#1723HardFrequency: 21.9%

Maximum Number of Achievable Transfer Requests

Array Backtracking Bit Manipulation Enumeration

#980

Rank

#1755EasyFrequency: 21.9%

Defuse the Bomb

#981

Rank

#1874MediumFrequency: 21.9%

Form Array by Concatenating Subarrays of Another Array

Array Two Pointers Greedy String Matching Knuth–Morris–Pratt Algorithm

#982

Rank

#1957HardFrequency: 21.9%

Closest Room

Array Binary Search Sorting Ordered Set

#983

Rank

#2080MediumFrequency: 21.9%

Check if Move is Legal

Array Matrix Enumeration

#984

Rank

#2138MediumFrequency: 21.9%

Sum of Beauty in the Array

#985

Rank

#2205MediumFrequency: 21.9%

Find Good Days to Rob the Bank

#986

Rank

#2232MediumFrequency: 21.9%

Adding Spaces to a String

Array Two Pointers String Simulation

#987

Rank

#2388MediumFrequency: 21.9%

Replace Elements in an Array

#988

Rank

#2400HardFrequency: 21.9%

Minimum Score After Removals on a Tree

Array Bit Manipulation Tree Depth-First Search

#989

Rank

#2458MediumFrequency: 21.9%

Find Minimum Time to Finish All Jobs II

#990

Rank

#2555MediumFrequency: 21.9%

Design SQL

Array Hash Table String Design

#991

Rank

#2561EasyFrequency: 21.9%

Number of Distinct Averages

#992

Rank

#2590MediumFrequency: 21.9%

Maximum Star Sum of a Graph

Array Greedy Graph Theory Sorting Heap (Priority Queue)

#993

Rank

#2606MediumFrequency: 21.9%

Difference Between Ones and Zeros in Row and Column

#994

Rank

#2669MediumFrequency: 21.9%

Find the Substring With Maximum Cost

Array Hash Table String Dynamic Programming

#995

Rank

#2713MediumFrequency: 21.9%

Find the Divisibility Array of a String

Array Math String

#996

Rank

#3183EasyFrequency: 21.9%

Find the K-or of an Array

#997

Rank

#3242EasyFrequency: 21.9%

Count Elements With Maximum Frequency

#998

Rank

#1975EasyFrequency: 21.9%

Minimum Distance to the Target Element

#999

Rank

#3944MediumFrequency: 21.9%

Minimum Time to Activate String

#1000

Rank

#3766MediumFrequency: 21.9%

Maximum Median Sum of Subsequences of Size 3

Array Math Greedy Sorting Game Theory

#1001

Rank

#3166MediumFrequency: 21.9%

Minimum Number of Groups to Create a Valid Assignment

#1002

Rank

#4072HardFrequency: 21.9%

Total Sum of Interaction Cost in Tree Groups

Array Tree Depth-First Search

#1003

Rank

#751MediumFrequency: 21.5%

Number Of Corner Rectangles

Array Math Dynamic Programming Matrix

#1004

Rank

#929MediumFrequency: 21.5%

Groups of Special-Equivalent Strings

#1005

Rank

#1113MediumFrequency: 21.5%

Moving Stones Until Consecutive II

Array Math Sliding Window Sorting

#1006

Rank

#1556EasyFrequency: 21.5%

Make Two Arrays Equal by Reversing Subarrays

#1007

Rank

#1563HardFrequency: 21.5%

Maximum Number of Darts Inside of a Circular Dartboard

#1008

Rank

#2078MediumFrequency: 21.5%

Maximum Compatibility Score Sum

Array Dynamic Programming Backtracking Bit Manipulation Bitmask Hungarian Algorithm Bipartite Graph Successive Shortest Path Algorithm Matching (Graph)Perfect Matching Minimum-Cost Flow Flow Network

#1009

Rank

#2374MediumFrequency: 21.5%

Steps to Make Array Non-decreasing

Array Linked List Dynamic Programming Stack Monotonic Stack Simulation

#1010

Rank

#2483MediumFrequency: 21.5%

Task Scheduler II

#1011

Rank

#2662MediumFrequency: 21.5%

Check Knight Tour Configuration

Array Depth-First Search Breadth-First Search Matrix Simulation

#1012

Rank

#2465MediumFrequency: 21.5%

Shifting Letters II

#1013

Rank

#2204EasyFrequency: 21.5%

Find Subsequence of Length K With the Largest Sum

Array Hash Table Sorting Heap (Priority Queue)

#1014

Rank

#4240MediumFrequency: 21.5%

Find the Smallest Balanced Index

#1015

Rank

#391HardFrequency: 20.9%

Perfect Rectangle

Array Hash Table Math Geometry Sweep Line

#1016

Rank

#418MediumFrequency: 20.9%

Sentence Screen Fitting

#1017

Rank

#665MediumFrequency: 20.9%

Non-decreasing Array

#1018

Rank

#788HardFrequency: 20.9%

Minimize Max Distance to Gas Station

#1019

Rank

#864MediumFrequency: 20.9%

Image Overlap

#1020

Rank

#979EasyFrequency: 20.9%

DI String Match

Array Two Pointers String Greedy

#1021

Rank

#1081MediumFrequency: 20.9%

Video Stitching

#1022

Rank

#1241EasyFrequency: 20.9%

Decompress Run-Length Encoded List

#1023

Rank

#1310MediumFrequency: 20.9%

Watering Plants

#1024

Rank

#1727HardFrequency: 20.9%

Cat and Mouse II

Array Math Dynamic Programming Graph Theory Topological Sort Memoization Minimax Matrix Game Theory Zero-Sum Game

#1025

Rank

#1918HardFrequency: 20.9%

Maximum Score of a Good Subarray

Array Two Pointers Binary Search Stack Monotonic Stack Cartesian Tree

#1026

Rank

#2049MediumFrequency: 20.9%

Eliminate Maximum Number of Monsters

#1027

Rank

#2123MediumFrequency: 20.9%

The Number of Weak Characters in the Game

Array Stack Greedy Sorting Monotonic Stack

#1028

Rank

#2219EasyFrequency: 20.9%

Maximum Number of Words Found in Sentences

#1029

Rank

#2245MediumFrequency: 20.9%

Destroying Asteroids

#1030

Rank

#2472HardFrequency: 20.9%

Build a Matrix With Conditions

Array Graph Theory Topological Sort Matrix Directed Acyclic Graph

#1031

Rank

#2567MediumFrequency: 20.9%

Closest Nodes Queries in a Binary Search Tree

Array Binary Search Tree Depth-First Search Binary Search Tree Binary Tree

#1032

Rank

#2641MediumFrequency: 20.9%

Disconnect Path in a Binary Matrix by at Most One Flip

Array Dynamic Programming Depth-First Search Breadth-First Search Matrix

#1033

Rank

#3325MediumFrequency: 20.9%

Find the Largest Area of Square Inside Two Rectangles

#1034

Rank

#3491MediumFrequency: 20.9%

Find the Maximum Length of Valid Subsequence II

#1035

Rank

#302HardFrequency: 20.9%

Smallest Rectangle Enclosing Black Pixels

Array Binary Search Depth-First Search Breadth-First Search Matrix

#1036

Rank

#330HardFrequency: 20.9%

Patching Array

#1037

Rank

#2394HardFrequency: 20.9%

Count Subarrays With Score Less Than K

#1038

Rank

#2454EasyFrequency: 20.9%

Largest Local Values in a Matrix

#1039

Rank

#1902HardFrequency: 20.9%

Car Fleet II

Array Math Stack Heap (Priority Queue)Monotonic Stack

#1040

Rank

#3483MediumFrequency: 20.9%

Alternating Groups II

#1041

Rank

#3681MediumFrequency: 20.9%

Maximum Area Rectangle With Point Constraints I

Array Math Binary Indexed Tree Segment Tree Geometry Sorting Enumeration

#1042

Rank

#3775HardFrequency: 20.9%

Separate Squares II

Array Binary Search Segment Tree Sweep Line

#1043

Rank

#3794MediumFrequency: 20.9%

Find the Minimum Amount of Time to Brew Potions

Array Simulation Prefix Sum

#1044

Rank

#3888HardFrequency: 20.9%

Maximize Subarray GCD Score

Array Math Enumeration Number Theory

#1045

Rank

#2714EasyFrequency: 20.9%

Left and Right Sum Differences

#1046

Rank

#4027HardFrequency: 20.9%

Number of Stable Subsequences

#1047

Rank

#2297HardFrequency: 20.3%

Amount of New Area Painted Each Day

Array Segment Tree Ordered Set

#1048

Rank

#1990MediumFrequency: 20.3%

Get Biggest Three Rhombus Sums in a Grid

Array Math Sorting Heap (Priority Queue)Matrix Prefix Sum

#1049

Rank

#964HardFrequency: 20.3%

Minimize Malware Spread II

Array Hash Table Depth-First Search Breadth-First Search Union-Find Graph Theory

#1050

Rank

#3305HardFrequency: 20.3%

Count Prefix and Suffix Pairs II

Array String Trie Rolling Hash String Matching Hash Function Z Algorithm

#1051

Rank

#811MediumFrequency: 20.3%

Number of Subarrays with Bounded Maximum

#1052

Rank

#835MediumFrequency: 20.3%

Linked List Components

Array Hash Table Linked List

#1053

Rank

#361MediumFrequency: 20.3%

Bomb Enemy

#1054

Rank

#2469EasyFrequency: 20.3%

Longest Subsequence With Limited Sum

Array Binary Search Greedy Sorting Prefix Sum

#1055

Rank

#719HardFrequency: 20.3%

Find K-th Smallest Pair Distance

#1056

Rank

#3219MediumFrequency: 20.3%

Make Lexicographically Smallest Array by Swapping Elements

Array Union-Find Sorting

#1057

Rank

#790MediumFrequency: 20%

Global and Local Inversions

#1058

Rank

#1075EasyFrequency: 20%

Index Pairs of a String

Array String Trie Sorting Aho–Corasick Algorithm

#1059

Rank

#1082EasyFrequency: 20%

Sum of Digits in the Minimum Number

#1060

Rank

#1098EasyFrequency: 20%

Largest Unique Number

#1061

Rank

#1126MediumFrequency: 20%

Minimum Cost to Connect Sticks

#1062

Rank

#1145HardFrequency: 20%

Number of Submatrices That Sum to Target

Array Hash Table Matrix Prefix Sum

#1063

Rank

#1240MediumFrequency: 20%

Stone Game II

Array Math Dynamic Programming Minimax Prefix Sum Game Theory Zero-Sum Game

#1064

Rank

#1277HardFrequency: 20%

Largest Multiple of Three

Array Math Dynamic Programming Greedy Sorting

#1065

Rank

#1280EasyFrequency: 20%

Diet Plan Performance

#1066

Rank

#1511MediumFrequency: 20%

Count Number of Teams

Array Dynamic Programming Binary Indexed Tree Segment Tree

#1067

Rank

#1525MediumFrequency: 20%

Queries on a Permutation With Key

Array Binary Indexed Tree Simulation Sqrt Decomposition

#1068

Rank

#1662MediumFrequency: 20%

Minimum Numbers of Function Calls to Make Target Array

Array Greedy Bit Manipulation

#1069

Rank

#1677EasyFrequency: 20%

Matrix Diagonal Sum

#1070

Rank

#1767MediumFrequency: 20%

Design Front Middle Back Queue

Array Linked List Design Queue Doubly-Linked List Data Stream

#1071

Rank

#1835MediumFrequency: 20%

Decode XORed Permutation

#1072

Rank

#1836HardFrequency: 20%

Count Ways to Make Array With Product

Array Math Dynamic Programming Combinatorics Number Theory Prime Factorization Fermat's Little Theorem

#1073

Rank

#1891HardFrequency: 20%

Count Pairs Of Nodes

Array Hash Table Two Pointers Binary Search Graph Theory Sorting Counting

#1074

Rank

#1919MediumFrequency: 20%

Sort Features by Popularity

#1075

Rank

#1937HardFrequency: 20%

Maximize the Beauty of the Garden

Array Hash Table Greedy Prefix Sum

#1076

Rank

#2003MediumFrequency: 20%

Distinct Numbers in Each Subarray

#1077

Rank

#2018HardFrequency: 20%

Minimum Space Wasted From Packaging

Array Binary Search Sorting Prefix Sum

#1078

Rank

#2056MediumFrequency: 20%

Jump Game VIII

Array Dynamic Programming Stack Graph Theory Monotonic Stack Shortest Path

#1079

Rank

#2072MediumFrequency: 20%

Maximum of Minimum Values in All Subarrays

Array Stack Monotonic Stack Cartesian Tree

#1080

Rank

#2086HardFrequency: 20%

Count Number of Special Subsequences

#1081

Rank

#2108MediumFrequency: 20%

Minimize the Difference Between Target and Chosen Elements

#1082

Rank

#2112EasyFrequency: 20%

Minimum Difference Between Highest and Lowest of K Scores

Array Sliding Window Sorting

#1083

Rank

#2163EasyFrequency: 20%

Kth Distinct String in an Array

#1084

Rank

#2234HardFrequency: 20%

Minimum Operations to Make the Array K-Increasing

Array Binary Search Longest Increasing Subsequence

#1085

Rank

#2259HardFrequency: 20%

Minimum Operations to Remove Adjacent Ones in Matrix

Array Depth-First Search Graph Theory Matrix Edmonds–Karp Algorithm MPM Algorithm Push-Relabel Algorithm Flow Network Dinic's Algorithm

#1086

Rank

#2305MediumFrequency: 20%

Append K Integers With Minimal Sum

Array Math Greedy Sorting

#1087

Rank

#2369MediumFrequency: 20%

Maximum Sum Score of Array

#1088

Rank

#2392MediumFrequency: 20%

Successful Pairs of Spells and Potions

#1089

Rank

#2499HardFrequency: 20%

Minimum Money Required Before Transactions

#1090

Rank

#2586MediumFrequency: 20%

Longest Square Streak in an Array

Array Hash Table Binary Search Dynamic Programming Sorting

#1091

Rank

#2621MediumFrequency: 20%

Find Xor-Beauty of Array

#1092

Rank

#2658HardFrequency: 20%

Count the Number of K-Big Indices

Array Binary Search Divide and Conquer Binary Indexed Tree Segment Tree Merge Sort Ordered Set

#1093

Rank

#2738MediumFrequency: 20%

Count the Number of K-Free Subsets

Array Math Dynamic Programming Sorting Combinatorics

#1094

Rank

#2834MediumFrequency: 20%

Relocate Marbles

Array Hash Table Sorting Simulation

#1095

Rank

#2954MediumFrequency: 20%

Maximum Sum of Almost Unique Subarray

#1096

Rank

#3045EasyFrequency: 20%

Minimum Right Shifts to Sort the Array

#1097

Rank

#3088MediumFrequency: 20%

Maximal Range That Each Element Is Maximum in It

#1098

Rank

#3139HardFrequency: 20%

Subarrays Distinct Element Sum of Squares II

Array Hash Table Binary Indexed Tree Segment Tree

#1099

Rank

#3182MediumFrequency: 20%

Maximum Linear Stock Score

#1100

Rank

#3184HardFrequency: 20%

Maximum Balanced Subsequence Sum

Array Binary Search Dynamic Programming Binary Indexed Tree Segment Tree

#1101

Rank

#3382HardFrequency: 20%

Find the Number of Subarrays Where Boundary Elements Are Maximum

Array Binary Search Stack Monotonic Stack

#1102

Rank

#3471EasyFrequency: 20%

Minimum Average of Smallest and Largest Elements

#1103

Rank

#3506EasyFrequency: 20%

Count Triplets with Even XOR Set Bits I

#1104

Rank

#3521MediumFrequency: 20%

Count Triplets with Even XOR Set Bits II

#1105

Rank

#3685EasyFrequency: 20%

Count Subarrays of Length Three With a Condition

#1106

Rank

#4109MediumFrequency: 20%

Maximum Calories Burnt from Jumps

#1107

Rank

#4089MediumFrequency: 20%

Maximize Points After Choosing K Tasks

#1108

Rank

#4130MediumFrequency: 20%

Maximum Score After Binary Swaps

Array String Greedy Heap (Priority Queue)

#1109

Rank

#4142MediumFrequency: 20%

Maximum Total Value of Covered Indices

Array String Dynamic Programming Greedy

#1110

Rank

#3730MediumFrequency: 20%

Maximum Subarray Sum After Multiplier

#1111

Rank

#356MediumFrequency: 19.5%

Line Reflection

#1112

Rank

#370MediumFrequency: 19.5%

Range Addition

#1113

Rank

#487MediumFrequency: 19.5%

Max Consecutive Ones II

#1114

Rank

#604EasyFrequency: 19.5%

Design Compressed String Iterator

Array String Design Iterator

#1115

Rank

#734EasyFrequency: 19.5%

Sentence Similarity

#1116

Rank

#786MediumFrequency: 19.5%

Search in a Sorted Array of Unknown Size

Array Binary Search Interactive

#1117

Rank

#821HardFrequency: 19.5%

Bricks Falling When Hit

Array Union-Find Matrix

#1118

Rank

#831MediumFrequency: 19.5%

Largest Sum of Averages

#1119

Rank

#1000HardFrequency: 19.5%

Delete Columns to Make Sorted III

#1120

Rank

#1039EasyFrequency: 19.5%

Find the Town Judge

Array Hash Table Graph Theory

#1121

Rank

#1063MediumFrequency: 19.5%

Best Sightseeing Pair

#1122

Rank

#1115EasyFrequency: 19.5%

Valid Boomerang

#1123

Rank

#1224HardFrequency: 19.5%

Minimum Falling Path Sum II

#1124

Rank

#1232MediumFrequency: 19.5%

Sum of Mutated Array Closest to Target

#1125

Rank

#1489HardFrequency: 19.5%

Pizza With 3n Slices

Array Dynamic Programming Greedy Heap (Priority Queue)

#1126

Rank

#1622HardFrequency: 19.5%

Max Value of Equation

Array Queue Sliding Window Heap (Priority Queue)Monotonic Queue

#1127

Rank

#1627MediumFrequency: 19.5%

Last Moment Before All Ants Fall Out of a Plank

Array Brainteaser Simulation

#1128

Rank

#1716MediumFrequency: 19.5%

Maximum Non Negative Product in a Matrix

#1129

Rank

#1939MediumFrequency: 19.5%

Queries on Number of Points Inside a Circle

#1130

Rank

#2026MediumFrequency: 19.5%

Merge Triplets to Form Target Triplet

#1131

Rank

#2193HardFrequency: 19.5%

Count Fertile Pyramids in a Land

#1132

Rank

#2312EasyFrequency: 19.5%

Most Frequent Number Following Key In an Array

#1133

Rank

#2494HardFrequency: 19.5%

Sum of Prefix Scores of Strings

Array String Trie Counting

#1134

Rank

#2525MediumFrequency: 19.5%

Count Number of Distinct Integers After Reverse Operations

#1135

Rank

#2536EasyFrequency: 19.5%

Determine if Two Events Have Conflict

#1136

Rank

#2716MediumFrequency: 19.5%

Prime Subtraction Operation

Array Math Binary Search Greedy Number Theory

#1137

Rank

#3376HardFrequency: 19.5%

Longest Common Suffix Queries

Array String Trie

#1138

Rank

#2195EasyFrequency: 19.5%

Time Needed to Buy Tickets

Array Queue Simulation

#1139

Rank

#447MediumFrequency: 19.5%

Number of Boomerangs

#1140

Rank

#522MediumFrequency: 19.5%

Longest Uncommon Subsequence II

Array Hash Table Two Pointers String Sorting

#1141

Rank

#526MediumFrequency: 19.5%

Beautiful Arrangement

Array Dynamic Programming Backtracking Bit Manipulation Bitmask

#1142

Rank

#587HardFrequency: 19.5%

Erect the Fence

Array Math Geometry Convex Hull Polygons

#1143

Rank

#659MediumFrequency: 19.5%

Split Array into Consecutive Subsequences

Array Hash Table Greedy Heap (Priority Queue)

#1144

Rank

#2720MediumFrequency: 19.5%

Minimize the Maximum Difference of Pairs

Array Binary Search Dynamic Programming Greedy Sorting

#1145

Rank

#797MediumFrequency: 19.5%

Rabbits in Forest

Array Hash Table Math Greedy

#1146

Rank

#911HardFrequency: 19.5%

Profitable Schemes

Array Dynamic Programming Knapsack Problem 0-1 Knapsack

#1147

Rank

#987MediumFrequency: 19.5%

Reveal Cards In Increasing Order

Array Queue Sorting Simulation

#1148

Rank

#3575HardFrequency: 19.5%

Find the Maximum Sequence Value of Array

Array Dynamic Programming Bit Manipulation

#1149

Rank

#3311EasyFrequency: 19.5%

Ant on the Boundary

Array Simulation Prefix Sum

#1150

Rank

#2665MediumFrequency: 19.5%

Minimum Time to Repair Cars

#1151

Rank

#1656EasyFrequency: 19.5%

Count Good Triplets

#1152

Rank

#3535HardFrequency: 19.5%

Find the Count of Monotonic Pairs I

Array Math Dynamic Programming Combinatorics Prefix Sum

#1153

Rank

#3821MediumFrequency: 19.5%

Count Cells in Overlapping Horizontal and Vertical Substrings

Array String Rolling Hash String Matching Matrix Hash Function

#1154

Rank

#829MediumFrequency: 19.5%

Subdomain Visit Count

#1155

Rank

#4183MediumFrequency: 19.5%

Count Caesar Cipher Pairs

Array Hash Table Math String Counting

#1156

Rank

#2107MediumFrequency: 19.5%

Find Unique Binary String

Array Hash Table String Backtracking

#1157

Rank

#1657MediumFrequency: 19.5%

Find the Winner of an Array Game

#1158

Rank

#1458EasyFrequency: 19.5%

Sort Integers by The Number of 1 Bits

Array Bit Manipulation Sorting Counting

#1159

Rank

#1793MediumFrequency: 19.5%

Minimum Moves to Make Array Complementary

#1160

Rank

#4074MediumFrequency: 19.5%

Count Subarrays With Majority Element I

Array Hash Table Divide and Conquer Segment Tree Merge Sort Counting Prefix Sum

#1161

Rank

#2211MediumFrequency: 19.4%

K Radius Subarray Averages

#1162

Rank

#313MediumFrequency: 18%

Super Ugly Number

#1163

Rank

#527HardFrequency: 18%

Word Abbreviation

Array String Greedy Trie Sorting

#1164

Rank

#562MediumFrequency: 18%

Longest Line of Consecutive One in Matrix

#1165

Rank

#667MediumFrequency: 18%

Beautiful Arrangement II

#1166

Rank

#683HardFrequency: 18%

K Empty Slots

Array Binary Indexed Tree Segment Tree Queue Sliding Window Heap (Priority Queue)Ordered Set Monotonic Queue

#1167

Rank

#749EasyFrequency: 18%

Shortest Completing Word

#1168

Rank

#762EasyFrequency: 18%

Find Anagram Mappings

#1169

Rank

#887HardFrequency: 18%

Minimum Cost to Hire K Workers

#1170

Rank

#1192HardFrequency: 18%

Divide Chocolate

#1171

Rank

#1324MediumFrequency: 18%

Where Will the Ball Fall

#1172

Rank

#1393HardFrequency: 18%

Maximum Value of K Coins From Piles

#1173

Rank

#1545HardFrequency: 18%

Form Largest Integer With Digits That Add up to Target

Array Dynamic Programming Knapsack Problem Complete Knapsack

#1174

Rank

#1573MediumFrequency: 18%

Find Two Non-overlapping Sub-arrays Each With Target Sum

Array Hash Table Binary Search Dynamic Programming Sliding Window

#1175

Rank

#1615MediumFrequency: 18%

Range Sum of Sorted Subarray Sums

Array Two Pointers Binary Search Sorting Prefix Sum

#1176

Rank

#1692HardFrequency: 18%

Number of Ways to Reorder Array to Get Same BST

Array Math Divide and Conquer Dynamic Programming Tree Union-Find Binary Search Tree Memoization Combinatorics Binary Tree Fermat's Little Theorem

#1177

Rank

#1696HardFrequency: 18%

Strange Printer II

Array Graph Theory Topological Sort Matrix Directed Acyclic Graph

#1178

Rank

#1717HardFrequency: 18%

Minimum Cost to Connect Two Groups of Points

Array Dynamic Programming Bit Manipulation Matrix Bitmask Bipartite Graph Successive Shortest Path Algorithm Matching (Graph)Minimum-Cost Flow Flow Network

#1179

Rank

#1758HardFrequency: 18%

Distribute Repeating Integers

Array Hash Table Dynamic Programming Backtracking Bit Manipulation Counting Bitmask

#1180

Rank

#1832HardFrequency: 18%

Minimum Operations to Make a Subsequence

Array Hash Table Binary Search Greedy Longest Increasing Subsequence

#1181

Rank

#1851HardFrequency: 18%

Maximum Number of Events That Can Be Attended II

#1182

Rank

#1860MediumFrequency: 18%

Find Kth Largest XOR Coordinate Value

Array Divide and Conquer Bit Manipulation Sorting Heap (Priority Queue)Matrix Prefix Sum Quickselect

#1183

Rank

#1876MediumFrequency: 18%

Map of Highest Peak

#1184

Rank

#1896HardFrequency: 18%

Maximum Score from Performing Multiplication Operations

#1185

Rank

#1924HardFrequency: 18%

Maximum Number of Groups Getting Fresh Donuts

Array Dynamic Programming Bit Manipulation Memoization Bitmask

#1186

Rank

#2069MediumFrequency: 18%

Kth Smallest Subarray Sum

Array Binary Search Sliding Window

#1187

Rank

#2104MediumFrequency: 18%

Operations on Tree

Array Hash Table Tree Depth-First Search Breadth-First Search Design

#1188

Rank

#2183MediumFrequency: 18%

Minimum Operations to Convert Number

Array Breadth-First Search

#1189

Rank

#2291HardFrequency: 18%

Maximum AND Sum of Array

#1190

Rank

#2341EasyFrequency: 18%

Count Prefixes of a Given String

#1191

Rank

#2447EasyFrequency: 18%

Merge Similar Items

Array Hash Table Sorting Ordered Set

#1192

Rank

#2513HardFrequency: 18%

Number of Pairs Satisfying Inequality

Array Binary Search Divide and Conquer Binary Indexed Tree Segment Tree Merge Sort Ordered Set

#1193

Rank

#2625MediumFrequency: 18%

Increment Submatrices by One

#1194

Rank

#2849HardFrequency: 18%

Sum of Imbalance Numbers of All Subarrays

#1195

Rank

#3416MediumFrequency: 18%

Sum of Digit Differences of All Pairs

#1196

Rank

#2338MediumFrequency: 18%

Minimum Consecutive Cards to Pick Up

#1197

Rank

#379MediumFrequency: 18%

Design Phone Directory

Array Hash Table Linked List Design Queue

#1198

Rank

#718MediumFrequency: 18%

Maximum Length of Repeated Subarray

Array Binary Search Dynamic Programming Sliding Window Rolling Hash Hash Function

#1199

Rank

#816EasyFrequency: 18%

Design HashSet

Array Hash Table Linked List Design Hash Function

#1200

Rank

#924EasyFrequency: 18%

Fair Candy Swap

Array Hash Table Binary Search Sorting

#1201

Rank

#3158MediumFrequency: 18%

Maximum Length of Semi-Decreasing Subarrays

Array Stack Sorting Monotonic Stack

#1202

Rank

#1711MediumFrequency: 18%

Find Valid Matrix Given Row and Column Sums

Array Greedy Matrix Flow Network

#1203

Rank

#3524MediumFrequency: 18%

Minimum Number of Flips to Make Binary Grid Palindromic II

Array Two Pointers Matrix

#1204

Rank

#3152MediumFrequency: 18%

Maximum Value of an Ordered Triplet II

#1205

Rank

#3194EasyFrequency: 18%

Find Words Containing Character

#1206

Rank

#3892MediumFrequency: 18%

Best Time to Buy and Sell Stock V

#1207

Rank

#2529MediumFrequency: 18%

Range Product Queries of Powers

Array Bit Manipulation Prefix Sum

#1208

Rank

#4010HardFrequency: 18%

Maximize Alternating Sum Using Swaps

Array Greedy Union-Find Sorting

#1209

Rank

#4015MediumFrequency: 18%

Split Array With Minimum Difference

#1210

Rank

#4161MediumFrequency: 18%

Minimum Bitwise OR From Grid

Array Greedy Bit Manipulation Matrix

#1211

Rank

#2551EasyFrequency: 18%

Apply Operations to an Array

#1212

Rank

#2179MediumFrequency: 18%

Most Beautiful Item for Each Query

#1213

Rank

#1663MediumFrequency: 18%

Detect Cycles in 2D Grid

Array Depth-First Search Breadth-First Search Union-Find Matrix

#1214

Rank

#1388MediumFrequency: 18%

Greatest Sum Divisible by Three

Array Dynamic Programming Greedy Sorting

#1215

Rank

#3799EasyFrequency: 18%

Unique 3-Digit Even Numbers

Array Hash Table Recursion Enumeration

#1216

Rank

#2180HardFrequency: 18%

Maximum Number of Tasks You Can Assign

Array Two Pointers Binary Search Greedy Queue Sorting Monotonic Queue

#1217

Rank

#3651EasyFrequency: 18%

Transformed Array

#1218

Rank

#609MediumFrequency: 17%

Find Duplicate File in System

#1219

Rank

#566EasyFrequency: 17%

Reshape the Matrix

#1220

Rank

#3372EasyFrequency: 17%

Longest Strictly Increasing or Strictly Decreasing Subarray

#1221

Rank

#3332MediumFrequency: 17%

Minimum Operations to Exceed Threshold Value II

#1222

Rank

#2277EasyFrequency: 17%

Count Equal and Divisible Pairs in an Array

#1223

Rank

#281MediumFrequency: 16.4%

Zigzag Iterator

Array Design Queue Iterator

#1224

Rank

#288MediumFrequency: 16.4%

Unique Word Abbreviation

Array Hash Table String Design

#1225

Rank

#411HardFrequency: 16.4%

Minimum Unique Word Abbreviation

Array String Backtracking Bit Manipulation

#1226

Rank

#422EasyFrequency: 16.4%

Valid Word Square

#1227

Rank

#425HardFrequency: 16.4%

Word Squares

Array String Backtracking Trie

#1228

Rank

#469MediumFrequency: 16.4%

Convex Polygon

Array Math Geometry Polygons

#1229

Rank

#484MediumFrequency: 16.4%

Find Permutation

Array String Stack Greedy

#1230

Rank

#510MediumFrequency: 16.4%

Count Subarrays With More Ones Than Zeros

Array Hash Table Binary Search Divide and Conquer Binary Indexed Tree Segment Tree Merge Sort Ordered Set

#1231

Rank

#531MediumFrequency: 16.4%

Lonely Pixel I

#1232

Rank

#533MediumFrequency: 16.4%

Lonely Pixel II

#1233

Rank

#568HardFrequency: 16.4%

Maximum Vacation Days

#1234

Rank

#644HardFrequency: 16.4%

Maximum Average Subarray II

Array Binary Search Prefix Sum

#1235

Rank

#656HardFrequency: 16.4%

Coin Path

#1236

Rank

#760MediumFrequency: 16.4%

Bold Words in String

Array Hash Table String Trie String Matching Aho–Corasick Algorithm

#1237

Rank

#798HardFrequency: 16.4%

Transform to Chessboard

Array Math Bit Manipulation Matrix

#1238

Rank

#991MediumFrequency: 16.4%

Array of Doubled Pairs

#1239

Rank

#1067MediumFrequency: 16.4%

Campus Bikes II

Array Dynamic Programming Backtracking Bit Manipulation Bitmask Hungarian Algorithm Bipartite Graph Successive Shortest Path Algorithm Matching (Graph)Minimum-Cost Flow Flow Network

#1240

Rank

#1080MediumFrequency: 16.4%

Camelcase Matching

Array Two Pointers String Trie String Matching

#1241

Rank

#1118HardFrequency: 16.4%

Divide Array Into Increasing Sequences

Array Counting

#1242

Rank

#1134MediumFrequency: 16.4%

Shortest Distance to Target Color

Array Binary Search Dynamic Programming

#1243

Rank

#1167HardFrequency: 16.4%

Minimum Time to Build Blocks

Array Math Greedy Heap (Priority Queue)

#1244

Rank

#1169MediumFrequency: 16.4%

Largest Values From Labels

Array Hash Table Greedy Sorting Counting

#1245

Rank

#1210EasyFrequency: 16.4%

Mean of Array After Removing Some Elements

#1246

Rank

#1247MediumFrequency: 16.4%

Decrease Elements To Make Array Zigzag

#1247

Rank

#1273MediumFrequency: 16.4%

Compare Strings by Frequency of the Smallest Character

Array Hash Table String Binary Search Sorting

#1248

Rank

#1287EasyFrequency: 16.4%

Distance Between Bus Stops

#1249

Rank

#1384MediumFrequency: 16.4%

Maximum Font to Fit a Sentence in a Screen

Array String Binary Search Interactive

#1250

Rank

#1394MediumFrequency: 16.4%

Minimum Path Cost in a Grid

#1251

Rank

#1562MediumFrequency: 16.4%

People Whose List of Favorite Companies Is Not a Subset of Another List

#1252

Rank

#1581MediumFrequency: 16.4%

The k Strongest Values in an Array

#1253

Rank

#1649MediumFrequency: 16.4%

Maximum Number of Non-Overlapping Subarrays With Sum Equals Target

Array Hash Table Greedy Prefix Sum

#1254

Rank

#1681MediumFrequency: 16.4%

Guess the Majority in a Hidden Array

Array Math Interactive Boyer–Moore Majority Vote Algorithm

#1255

Rank

#1684MediumFrequency: 16.4%

Find Latest Group of Size M

Array Hash Table Binary Search Simulation

#1256

Rank

#1687HardFrequency: 16.4%

The Most Similar Path in a Graph

Array String Dynamic Programming Graph Theory

#1257

Rank

#1703MediumFrequency: 16.4%

Put Boxes Into the Warehouse I

#1258

Rank

#1719MediumFrequency: 16.4%

Put Boxes Into the Warehouse II

#1259

Rank

#1847EasyFrequency: 16.4%

Largest Subarray Length K

#1260

Rank

#1875HardFrequency: 16.4%

Tree of Coprimes

Array Math Tree Depth-First Search Number Theory

#1261

Rank

#1900MediumFrequency: 16.4%

Closest Dessert Cost

Array Dynamic Programming Backtracking Knapsack Problem Mixed Knapsack

#1262

Rank

#1903MediumFrequency: 16.4%

Design Most Recently Used Queue

Array Linked List Divide and Conquer Design Simulation Doubly-Linked List Sqrt Decomposition Treap Splay Tree

#1263

Rank

#1935MediumFrequency: 16.4%

Minimum Number of Operations to Reinitialize a Permutation

Array Math Simulation

#1264

Rank

#2009MediumFrequency: 16.4%

Longest Word With All Prefixes

Array String Depth-First Search Trie

#1265

Rank

#2013HardFrequency: 16.4%

Minimum Skips to Arrive at Meeting On Time

#1266

Rank

#2029MediumFrequency: 16.4%

Minimize Product Sum of Two Arrays

#1267

Rank

#2034MediumFrequency: 16.4%

Minimum Absolute Difference Queries

#1268

Rank

#2071MediumFrequency: 16.4%

Longest Common Subsequence Between Sorted Arrays

#1269

Rank

#2074HardFrequency: 16.4%

Erect the Fence II

Array Math Geometry Minimum Enclosing Circle

#1270

Rank

#2228MediumFrequency: 16.4%

Watering Plants II

#1271

Rank

#2241HardFrequency: 16.4%

Recover the Original Array

Array Hash Table Two Pointers Sorting Enumeration

#1272

Rank

#2256MediumFrequency: 16.4%

Count Words Obtained After Adding a Letter

Array Hash Table String Bit Manipulation Sorting

#1273

Rank

#2261MediumFrequency: 16.4%

All Divisions With the Highest Score of a Binary Array

#1274

Rank

#2268MediumFrequency: 16.4%

Remove All Ones With Row and Column Flips

Array Math Bit Manipulation Matrix

#1275

Rank

#2314MediumFrequency: 16.4%

Remove All Ones With Row and Column Flips II

Array Bit Manipulation Breadth-First Search Matrix

#1276

Rank

#2349HardFrequency: 16.4%

Check if There Is a Valid Parentheses String Path

Array Dynamic Programming Matrix Bracket Sequences

#1277

Rank

#2352MediumFrequency: 16.4%

Design an ATM Machine

Array Greedy Design

#1278

Rank

#2359MediumFrequency: 16.4%

Maximum White Tiles Covered by a Carpet

Array Binary Search Greedy Sliding Window Sorting Prefix Sum

#1279

Rank

#2367MediumFrequency: 16.4%

Minimum Lines to Represent a Line Chart

Array Math Geometry Sorting Number Theory

#1280

Rank

#2385MediumFrequency: 16.4%

Count Positions on Street With Required Brightness

#1281

Rank

#2435HardFrequency: 16.4%

Shortest Impossible Sequence of Rolls

#1282

Rank

#2489HardFrequency: 16.4%

Sort Array by Moving Items to Empty Space

#1283

Rank

#2506HardFrequency: 16.4%

Minimize Maximum Value in a Grid

Array Union-Find Graph Theory Topological Sort Sorting Matrix

#1284

Rank

#2875EasyFrequency: 16.4%

Count Houses in a Circular Street

Array Interactive

#1285

Rank

#2953MediumFrequency: 16.4%

Count Pairs of Points With Distance k

#1286

Rank

#3178MediumFrequency: 16.4%

Minimum Increment Operations to Make Array Beautiful

#1287

Rank

#3188EasyFrequency: 16.4%

Find Champion I

#1288

Rank

#3212HardFrequency: 16.4%

Count the Number of Good Partitions

Array Hash Table Math Combinatorics

#1289

Rank

#3222MediumFrequency: 16.4%

Number of Equal Numbers Blocks

Array Binary Search Interactive

#1290

Rank

#3229MediumFrequency: 16.4%

Minimum Cost to Make Array Equalindromic

Array Math Binary Search Greedy Sorting

#1291

Rank

#3298HardFrequency: 16.4%

Maximize Consecutive Elements in an Array After Modification

#1292

Rank

#3314MediumFrequency: 16.4%

Most Frequent Prime

Array Hash Table Math Matrix Counting Enumeration Number Theory Primality Test Sieve Theory Prime Number Sieve

#1293

Rank

#3364HardFrequency: 16.4%

Minimum Sum of Values by Dividing Array

Array Binary Search Dynamic Programming Bit Manipulation Segment Tree Queue

#1294

Rank

#2181EasyFrequency: 16.4%

Smallest Index With Equal Value

#1295

Rank

#2263HardFrequency: 16.4%

Maximum Running Time of N Computers

#1296

Rank

#500EasyFrequency: 16.4%

Keyboard Row

#1297

Rank

#980HardFrequency: 16.4%

Find the Shortest Superstring

Array String Dynamic Programming Bit Manipulation Bitmask Hamiltonian Path

#1298

Rank

#1037HardFrequency: 16.4%

Minimum Number of K Consecutive Bit Flips

Array Bit Manipulation Queue Sliding Window Prefix Sum Brute-Force Search

#1299

Rank

#1217EasyFrequency: 16.4%

Relative Sort Array

Array Hash Table Sorting Counting Sort Quicksort Bubble Sort

#1300

Rank

#3464MediumFrequency: 16.4%

Maximize Total Cost of Alternating Subarrays

#1301

Rank

#3583HardFrequency: 16.4%

Sorted GCD Pair Queries

Array Hash Table Math Binary Search Combinatorics Counting Number Theory Prefix Sum Euclidean Algorithm Greatest Common Divisor

#1302

Rank

#546HardFrequency: 16.4%

Remove Boxes

Array Dynamic Programming Memoization

#1303

Rank

#3348HardFrequency: 16.4%

Minimum Cost Walk in Weighted Graph

Array Bit Manipulation Union-Find Graph Theory

#1304

Rank

#1018EasyFrequency: 16.4%

Largest Perimeter Triangle

Array Math Greedy Sorting Quicksort Polygons

#1305

Rank

#3909MediumFrequency: 16.4%

Minimum Increments to Equalize Leaf Paths

#1306

Rank

#1001EasyFrequency: 16.4%

N-Repeated Element in Size 2N Array

Array Hash Table Pigeonhole Principle

#1307

Rank

#3938MediumFrequency: 16.4%

Twisted Mirror Path Count

#1308

Rank

#2753MediumFrequency: 16.4%

Minimum Number of Operations to Make All Array Elements Equal to 1

Array Math Number Theory Euclidean Algorithm Greatest Common Divisor

#1309

Rank

#4085MediumFrequency: 16.4%

Largest Prime from Consecutive Prime Sum

Array Math Number Theory

#1310

Rank

#3970MediumFrequency: 16.4%

Power Update After K-th Largest Insertion I

Array Hash Table Math Segment Tree Sorting Heap (Priority Queue)

#1311

Rank

#3967MediumFrequency: 16.4%

Earliest Finish Time for Land and Water Rides II

#1312

Rank

#3724MediumFrequency: 16.4%

Filter Occupied Intervals

#1313

Rank

#462MediumFrequency: 16.1%

Minimum Moves to Equal Array Elements II

Array Math Sorting

#1314

Rank

#2636MediumFrequency: 16.1%

Maximum Subsequence Score

#1315

Rank

#436MediumFrequency: 16.1%

Find Right Interval

#1316

Rank

#3517MediumFrequency: 16.1%

Shortest Distance After Road Addition Queries I

Array Breadth-First Search Graph Theory

#1317

Rank

#2711HardFrequency: 16.1%

Minimum Time to Visit a Cell In a Grid

Array Breadth-First Search Graph Theory Heap (Priority Queue)Matrix Shortest Path

#1318

Rank

#3555EasyFrequency: 16.1%

Final Array State After K Multiplication Operations I

Array Math Heap (Priority Queue)Simulation

#1319

Rank

#1631MediumFrequency: 16.1%

Number of Sub-arrays With Odd Sum

Array Math Dynamic Programming Prefix Sum

#1320

Rank

#2614EasyFrequency: 16.1%

Maximum Count of Positive Integer and Negative Integer

Array Binary Search Counting

#1321

Rank

#1814MediumFrequency: 16.1%

Jump Game VI

Array Dynamic Programming Queue Heap (Priority Queue)Monotonic Queue

#1322

Rank

#841EasyFrequency: 16.1%

Shortest Distance to a Character

#1323

Rank

#759HardFrequency: 16.1%

Set Intersection Size At Least Two

#1324

Rank

#1284MediumFrequency: 16.1%

Four Divisors

Array Math Prime Factorization Sieve Theory

#1325

Rank

#3611MediumFrequency: 16.1%

Construct the Minimum Bitwise Array II

#1326

Rank

#3226EasyFrequency: 16.1%

Minimum Number Game

Array Sorting Heap (Priority Queue)Simulation

#1327

Rank

#1353EasyFrequency: 15.7%

Find Resultant Array After Removing Anagrams

#1328

Rank

#1690MediumFrequency: 15.7%

Maximum Length of Subarray With Positive Product

#1329

Rank

#1787MediumFrequency: 15.7%

Sum of Absolute Differences in a Sorted Array

Array Math Prefix Sum

#1330

Rank

#2600MediumFrequency: 15.7%

Maximum Tastiness of Candy Basket

#1331

Rank

#905MediumFrequency: 15.7%

Length of Longest Fibonacci Subsequence

#1332

Rank

#2144EasyFrequency: 15.7%

Maximum Difference Between Increasing Elements

#1333

Rank

#3954MediumFrequency: 15.7%

Maximum Balanced Shipments

Array Dynamic Programming Stack Greedy Monotonic Stack

#1334

Rank

#3437MediumFrequency: 15.7%

Maximum Total Damage With Spell Casting

Array Hash Table Two Pointers Binary Search Dynamic Programming Sorting Counting

#1335

Rank

#3653MediumFrequency: 15.7%

Maximum Subarray Sum With Length Divisible by K

#1336

Rank

#3772HardFrequency: 15.7%

Minimum Pair Removal to Sort Array II

Array Hash Table Linked List Heap (Priority Queue)Simulation Doubly-Linked List Ordered Set

#1337

Rank

#2248EasyFrequency: 15.7%

Minimum Cost of Buying Candies With Discount

#1338

Rank

#3965EasyFrequency: 15.7%

Earliest Finish Time for Land and Water Rides I

#1339

Rank

#2106EasyFrequency: 14.6%

Find Greatest Common Divisor of Array

Array Math Number Theory Euclidean Algorithm Greatest Common Divisor

#1340

Rank

#2755MediumFrequency: 14.6%

Extra Characters in a String

Array Hash Table String Dynamic Programming Trie

#1341

Rank

#1032MediumFrequency: 14.6%

Satisfiability of Equality Equations

Array String Union-Find Graph Theory

#1342

Rank

#859MediumFrequency: 14.6%

Design Circular Deque

Array Linked List Design Queue

#1343

Rank

#1786EasyFrequency: 14.6%

Count the Number of Consistent Strings

Array Hash Table String Bit Manipulation Counting

#1344

Rank

#1435MediumFrequency: 14.6%

XOR Queries of a Subarray

Array Bit Manipulation Prefix Sum

#1345

Rank

#3558MediumFrequency: 14.6%

Find a Safe Walk Through a Grid

Array Breadth-First Search Graph Theory Heap (Priority Queue)Matrix Shortest Path

#1346

Rank

#2170MediumFrequency: 14.6%

Count Number of Maximum Bitwise-OR Subsets

Array Backtracking Bit Manipulation Enumeration

#1347

Rank

#2692EasyFrequency: 14.6%

Take Gifts From the Richest Pile

#1348

Rank

#3431HardFrequency: 14.6%

Find the Minimum Cost Array Permutation

#1349

Rank

#2709MediumFrequency: 14.6%

Count the Number of Square-Free Subsets

Array Math Dynamic Programming Bit Manipulation Number Theory Bitmask

#1350

Rank

#1659HardFrequency: 14.6%

Get the Maximum Score

Array Two Pointers Dynamic Programming Greedy

#1351

Rank

#3791MediumFrequency: 14.6%

Fruits Into Baskets III

Array Binary Search Segment Tree Ordered Set

#1352

Rank

#3852HardFrequency: 14.6%

Path Existence Queries in a Graph II

Array Two Pointers Binary Search Dynamic Programming Greedy Bit Manipulation Graph Theory Sorting

#1353

Rank

#1548EasyFrequency: 14.6%

Check If All 1's Are at Least Length K Places Away

#1354

Rank

#3846EasyFrequency: 14.6%

Minimum Operations to Make Array Sum Divisible by K

#1355

Rank

#1988MediumFrequency: 14.6%

Minimize Maximum Pair Sum in Array

#1356

Rank

#3986MediumFrequency: 14.6%

Maximum Path Score in a Grid

#1357

Rank

#1293EasyFrequency: 14.4%

Three Consecutive Odds

#1358

Rank

#3307HardFrequency: 14.4%

Find the Maximum Sum of Node Values

Array Dynamic Programming Greedy Bit Manipulation Tree Sorting

#1359

Rank

#2350EasyFrequency: 13.2%

Find Closest Number to Zero

#1360

Rank

#599EasyFrequency: 13.2%

Minimum Index Sum of Two Lists

#1361

Rank

#1096MediumFrequency: 13.2%

Maximum Sum of Two Non-Overlapping Subarrays

#1362

Rank

#1367HardFrequency: 13.2%

Maximum Height by Stacking Cuboids

#1363

Rank

#3383MediumFrequency: 13.2%

Taking Maximum Energy From the Mystic Dungeon

#1364

Rank

#2661MediumFrequency: 13.2%

Smallest Missing Non-negative Integer After Operations

Array Hash Table Math Greedy

#1365

Rank

#3214MediumFrequency: 13.2%

Maximize Area of Square Hole in Grid

#1366

Rank

#3889HardFrequency: 13.2%

Minimum Cost Path with Teleportations

#1367

Rank

#4045MediumFrequency: 13.2%

Longest Balanced Subarray I

Array Hash Table Divide and Conquer Segment Tree Prefix Sum

#1368

Rank

#2685MediumFrequency: 13.2%

First Completely Painted Row or Column

#1369

Rank

#2808HardFrequency: 12.6%

Painting the Walls

#1370

Rank

#624MediumFrequency: 12.6%

Maximum Distance in Arrays

#1371

Rank

#3434MediumFrequency: 12.6%

Find the Number of Distinct Colors Among the Balls

#1372

Rank

#1466HardFrequency: 12.6%

Jump Game V

#1373

Rank

#2199EasyFrequency: 12.6%

Two Furthest Houses With Different Colors

#1374

Rank

#1471HardFrequency: 12.6%

Maximum Students Taking Exam

Array Dynamic Programming Bit Manipulation Matrix Bitmask Maximum Flow Maximum Matching Bipartite Graph Edmonds–Karp Algorithm MPM Algorithm Push-Relabel Algorithm Minimum Cut Matching (Graph)Flow Network Dinic's Algorithm

#1375

Rank

#2229HardFrequency: 12.6%

Maximum Fruits Harvested After at Most K Steps

#1376

Rank

#3744HardFrequency: 12.6%

Minimum Operations to Make Array Elements Zero

#1377

Rank

#3581EasyFrequency: 12.6%

The Two Sneaky Numbers of Digitville

#1378

Rank

#2274EasyFrequency: 12.6%

Keep Multiplying Found Values by Two

Array Hash Table Sorting Simulation

#1379

Rank

#3470HardFrequency: 12.6%

Maximum Score From Grid Operations

Array Dynamic Programming Matrix Prefix Sum

#1380

Rank

#993HardFrequency: 12%

Tallest Billboard

Array Dynamic Programming Meet in the Middle Knapsack Problem 0-1 Knapsack

#1381

Rank

#2428MediumFrequency: 12%

Equal Row and Column Pairs

Array Hash Table Matrix Simulation

#1382

Rank

#2060HardFrequency: 12%

Merge BSTs to Create Single BST

Array Hash Table Tree Depth-First Search Binary Search Tree Binary Tree

#1383

Rank

#2411MediumFrequency: 12%

Spiral Matrix IV

Array Linked List Matrix Simulation

#1384

Rank

#3291MediumFrequency: 12%

Find if Array Can Be Sorted

Array Bit Manipulation Sorting

#1385

Rank

#1147MediumFrequency: 12%

Flip Columns For Maximum Number of Equal Rows

#1386

Rank

#3427MediumFrequency: 12%

Special Array II

Array Binary Search Prefix Sum

#1387

Rank

#2764MediumFrequency: 12%

Maximum Number of Fish in a Grid

Array Depth-First Search Breadth-First Search Union-Find Matrix

#1388

Rank

#2160MediumFrequency: 12%

Minimum Operations to Make a Uni-Value Grid

Array Math Sorting Matrix

#1389

Rank

#3621EasyFrequency: 12%

Minimum Operations to Make Array Values Equal to K

#1390

Rank

#2553MediumFrequency: 12%

Total Cost to Hire K Workers

Array Two Pointers Heap (Priority Queue)Simulation

#1391

Rank

#3747EasyFrequency: 12%

Maximum Difference Between Adjacent Elements in a Circular Array

#1392

Rank

#2409HardFrequency: 12%

Number of Increasing Paths in a Grid

Array Dynamic Programming Depth-First Search Breadth-First Search Graph Theory Topological Sort Memoization Matrix

#1393

Rank

#3721MediumFrequency: 12%

Count Mentions Per User

Array Math Sorting Simulation

#1394

Rank

#3031MediumFrequency: 12%

Construct Product Matrix

#1395

Rank

#3849MediumFrequency: 12%

Equal Sum Grid Partition I

Array Matrix Enumeration Prefix Sum

#1396

Rank

#3677MediumFrequency: 12%

Maximum Amount of Money Robot Can Earn

#1397

Rank

#4139MediumFrequency: 12%

Minimum Absolute Distance Between Mirror Pairs

#1398

Rank

#3606EasyFrequency: 12%

Minimum Element After Replacement With Digit Sum

#1399

Rank

#3777HardFrequency: 12%

Maximum Product of Subsequences With an Alternating Sum Equal to K

#1400

Rank

#2319HardFrequency: 12%

Longest Substring of One Repeating Character

Array String Segment Tree Ordered Set

#1401

Rank

#1720EasyFrequency: 11.4%

Crawler Log Folder

Array String Stack

#1402

Rank

#3380MediumFrequency: 11.4%

Shortest Subarray With OR at Least K II

Array Bit Manipulation Sliding Window

#1403

Rank

#3221EasyFrequency: 11.4%

Find the Peaks

#1404

Rank

#3428EasyFrequency: 11.4%

Find the XOR of Numbers Which Appear Twice

#1405

Rank

#454MediumFrequency: 11.4%

4Sum II

#1406

Rank

#2343MediumFrequency: 11.4%

Count Unguarded Cells in the Grid

#1407

Rank

#1866MediumFrequency: 11.4%

Restore the Array From Adjacent Pairs

Array Hash Table Depth-First Search

#1408

Rank

#3835MediumFrequency: 11.4%

Count Partitions With Max-Min Difference at Most K

Array Dynamic Programming Queue Sliding Window Prefix Sum Monotonic Queue

#1409

Rank

#3885MediumFrequency: 11.4%

Count Special Triplets

#1410

Rank

#1968HardFrequency: 11.4%

Maximum Building Height

Array Math Sorting

#1411

Rank

#307MediumFrequency: 10.5%

Range Sum Query - Mutable

Array Divide and Conquer Design Binary Indexed Tree Segment Tree Sqrt Decomposition

#1412

Rank

#1228MediumFrequency: 10.5%

Minimum Cost Tree From Leaf Values

Array Dynamic Programming Stack Greedy Monotonic Stack Cartesian Tree

#1413

Rank

#1733HardFrequency: 10.5%

Maximum Number of Visible Points

Array Math Geometry Sliding Window Sorting

#1414

Rank

#921MediumFrequency: 10.5%

Spiral Matrix III

#1415

Rank

#3528MediumFrequency: 10.5%

Reach End of Array With Max Score

#1416

Rank

#2503MediumFrequency: 10.5%

Longest Subarray With Maximum Bitwise AND

Array Bit Manipulation Brainteaser

#1417

Rank

#2488MediumFrequency: 10.5%

Divide Intervals Into Minimum Number of Groups

Array Two Pointers Greedy Sorting Heap (Priority Queue)Prefix Sum

#1418

Rank

#3688HardFrequency: 10.5%

Maximize Subarray Sum After Removing All Occurrences of One Element

Array Hash Table Divide and Conquer Dynamic Programming Segment Tree Prefix Sum

#1419

Rank

#2721MediumFrequency: 10.5%

Sum of Distances

#1420

Rank

#3001HardFrequency: 10.5%

Apply Operations to Maximize Score

Array Math Stack Greedy Sorting Monotonic Stack Number Theory

#1421

Rank

#2280HardFrequency: 10.5%

Count Good Triplets in an Array

Array Binary Search Divide and Conquer Binary Indexed Tree Segment Tree Merge Sort Ordered Set

#1422

Rank

#1041EasyFrequency: 10.5%

Available Captures for Rook

#1423

Rank

#3213MediumFrequency: 10.5%

Count Subarrays Where Max Element Appears at Least K Times

#1424

Rank

#3748MediumFrequency: 10.5%

Sort Matrix by Diagonals

#1425

Rank

#3206EasyFrequency: 10.5%

Find Common Elements Between Two Arrays

#1426

Rank

#1834MediumFrequency: 10.5%

Minimum Number of People to Teach

#1427

Rank

#1389HardFrequency: 10.5%

Minimum Moves to Move a Box to Their Target Location

Array Breadth-First Search Heap (Priority Queue)Matrix

#1428

Rank

#2618HardFrequency: 10.5%

Maximize the Minimum Powered City

Array Binary Search Greedy Queue Sliding Window Prefix Sum

#1429

Rank

#3834MediumFrequency: 10.5%

Minimum Operations to Convert All Elements to Zero

Array Hash Table Stack Greedy Monotonic Stack

#1430

Rank

#717EasyFrequency: 10.5%

1-bit and 2-bit Characters

#1431

Rank

#3864MediumFrequency: 10.5%

Count the Number of Computer Unlocking Permutations

Array Math Brainteaser Combinatorics

#1432

Rank

#3250MediumFrequency: 10.5%

Maximum Square Area by Removing Fences From a Field

#1433

Rank

#1354MediumFrequency: 10.5%

Find Players With Zero or One Losses

Array Hash Table Sorting Counting

#1434

Rank

#3981MediumFrequency: 10.5%

Jump Game IX

#1435

Rank

#2892EasyFrequency: 10.5%

Check if Array is Good

#1436

Rank

#3842HardFrequency: 10.5%

Number of Ways to Assign Edge Weights II

Array Math Dynamic Programming Bit Manipulation Tree Depth-First Search

#1437

Rank

#3804HardFrequency: 10.5%

Maximize Active Section with Trade II

Array String Binary Search Segment Tree

#1438

Rank

#446HardFrequency: 10.3%

Arithmetic Slices II - Subsequence

#1439

Rank

#946MediumFrequency: 10.3%

Smallest Range II

Array Math Greedy Sorting

#1440

Rank

#1547EasyFrequency: 10.3%

Destination City

#1441

Rank

#2020EasyFrequency: 10.3%

Remove One Element to Make the Array Strictly Increasing

#1442

Rank

#3249MediumFrequency: 10.3%

Minimum Number of Operations to Make Array XOR Equal to K

#1443

Rank

#3235MediumFrequency: 10.3%

Minimum Cost to Convert String I

Array String Graph Theory Shortest Path

#1444

Rank

#3106MediumFrequency: 10.3%

Length of the Longest Subsequence That Sums to Target

Array Dynamic Programming Knapsack Problem 0-1 Knapsack

#1445

Rank

#2718MediumFrequency: 10.3%

Minimum Operations to Make All Array Elements Equal

Array Binary Search Sorting Prefix Sum

#1446

Rank

#1519EasyFrequency: 10.3%

Minimum Subsequence in Non-Increasing Order

#1447

Rank

#2695MediumFrequency: 10.3%

Find Score of an Array After Marking All Elements

Array Hash Table Sorting Heap (Priority Queue)Simulation

#1448

Rank

#2655MediumFrequency: 10.3%

Rearrange Array to Maximize Prefix Score

Array Greedy Sorting Prefix Sum

#1449

Rank

#2792MediumFrequency: 10.3%

Neighboring Bitwise XOR

#1450

Rank

#2878MediumFrequency: 10.3%

Apply Operations to Make All Array Elements Equal to Zero

#1451

Rank

#495EasyFrequency: 10.3%

Teemo Attacking

#1452

Rank

#3463EasyFrequency: 10.3%

Alternating Groups I

#1453

Rank

#2102EasyFrequency: 10.3%

Find the Middle Index in Array

#1454

Rank

#2129MediumFrequency: 10.3%

Number of Pairs of Interchangeable Rectangles

Array Hash Table Math Counting Number Theory

#1455

Rank

#3616EasyFrequency: 10.3%

Make Array Elements Equal to Zero

Array Simulation Prefix Sum

#1456

Rank

#3605EasyFrequency: 10.3%

Construct the Minimum Bitwise Array I

#1457

Rank

#1311MediumFrequency: 10.3%

Largest Magic Square

#1458

Rank

#1658MediumFrequency: 10.3%

Minimum Swaps to Arrange a Binary Grid

Array Greedy Matrix

#1459

Rank

#2855MediumFrequency: 10.3%

Maximum Number of Jumps to Reach the Last Index

#1460

Rank

#1009MediumFrequency: 10.3%

Pancake Sorting

#1461

Rank

#4005MediumFrequency: 10.3%

Maximum Total Subarray Value I

#1462

Rank

#3919HardFrequency: 10.3%

Network Recovery Pathways

Array Binary Search Dynamic Programming Graph Theory Topological Sort Heap (Priority Queue)Shortest Path

#1463

Rank

#1286HardFrequency: 8.1%

Constrained Subsequence Sum

Array Dynamic Programming Queue Sliding Window Heap (Priority Queue)Monotonic Queue

#1464

Rank

#2079HardFrequency: 8.1%

Delete Duplicate Folders in System

Array Hash Table String Depth-First Search Trie Sorting Hash Function

#1465

Rank

#2486EasyFrequency: 8.1%

Most Frequent Even Element

#1466

Rank

#825MediumFrequency: 8.1%

Max Increase to Keep City Skyline

Array Greedy Matrix

#1467

Rank

#1372HardFrequency: 8.1%

Check If It Is a Good Array

Array Math Number Theory Bézout's Lemma Euclidean Algorithm Greatest Common Divisor Extended Euclidean Algorithm

#1468

Rank

#2006MediumFrequency: 8.1%

Find the Student that Will Replace the Chalk

Array Binary Search Simulation Prefix Sum

#1469

Rank

#3476EasyFrequency: 8.1%

Find Minimum Operations to Make All Elements Divisible by Three

#1470

Rank

#2356MediumFrequency: 8.1%

Largest Combination With Bitwise AND Greater Than Zero

Array Hash Table Bit Manipulation Counting

#1471

Rank

#3522MediumFrequency: 8.1%

Find the Power of K-Size Subarrays I

#1472

Rank

#2915MediumFrequency: 8.1%

Count of Interesting Subarrays

#1473

Rank

#3582EasyFrequency: 8.1%

Find Indices of Stable Mountains

#1474

Rank

#2022MediumFrequency: 8.1%

Maximum Alternating Subsequence Sum

#1475

Rank

#2888MediumFrequency: 8.1%

Minimum Index of a Valid Split

#1476

Rank

#2708HardFrequency: 8.1%

Find the String with LCP

Array String Dynamic Programming Greedy Union-Find Matrix

#1477

Rank

#2398EasyFrequency: 8.1%

Check if Matrix Is X-Matrix

#1478

Rank

#3738MediumFrequency: 8.1%

Make Array Non-decreasing

Array Stack Greedy Monotonic Stack

#1479

Rank

#3847MediumFrequency: 8.1%

Minimum Swaps to Sort by Digit Sum

#1480

Rank

#959MediumFrequency: 8.1%

3Sum With Multiplicity

Array Hash Table Two Pointers Sorting Counting

#1481

Rank

#3900HardFrequency: 8.1%

Find Weighted Median Node in Tree

Array Binary Search Dynamic Programming Bit Manipulation Tree Depth-First Search

#1482

Rank

#1881HardFrequency: 8.1%

Closest Subsequence Sum

Array Two Pointers Dynamic Programming Bit Manipulation Meet in the Middle Sorting Bitmask

#1483

Rank

#3702EasyFrequency: 8.1%

Maximum Subarray With Equal Products

Array Math Sliding Window Enumeration Number Theory

#1484

Rank

#3873MediumFrequency: 8.1%

Subsequence Sum After Capping Elements

Array Two Pointers Dynamic Programming Sorting

#1485

Rank

#3797MediumFrequency: 8.1%

Design Spreadsheet

Array Hash Table String Design Matrix

#1486

Rank

#3592HardFrequency: 8.1%

Find X-Sum of All K-Long Subarrays II

Array Hash Table Sliding Window Heap (Priority Queue)

#1487

Rank

#3704EasyFrequency: 8.1%

Count Partitions with Even Sum Difference

Array Math Prefix Sum

#1488

Rank

#4030HardFrequency: 8.1%

Maximize Cyclic Partition Score

#1489

Rank

#3338MediumFrequency: 8.1%

Count Submatrices with Top-Left Element and Sum Less Than k

#1490

Rank

#3884MediumFrequency: 8.1%

Minimum Absolute Difference in Sliding Submatrix

#1491

Rank

#3850HardFrequency: 8.1%

Equal Sum Grid Partition II

Array Hash Table Matrix Enumeration Prefix Sum

#1492

Rank

#3781HardFrequency: 8.1%

Maximize the Distance Between Points on a Square

Array Math Binary Search Geometry Sorting

#1493

Rank

#457MediumFrequency: 8.1%

Circular Array Loop

Array Hash Table Two Pointers Floyd's Cycle Finding Algorithm

#1494

Rank

#3731EasyFrequency: 8.1%

Sum of Variable Length Subarrays

#1495

Rank

#1234HardFrequency: 8.1%

Number of Paths with Max Score

#1496

Rank

#3824MediumFrequency: 8.1%

Number of Unique XOR Triplets I

#1497

Rank

#3841HardFrequency: 8%

Concatenated Divisibility

#1498

Rank

#2866EasyFrequency: 8%

Longest Even Odd Subarray With Threshold

#1499

Rank

#2043MediumFrequency: 8%

Cyclically Rotating a Grid

#1500

Rank

#986MediumFrequency: 7.3%

Largest Time for Given Digits

Array String Backtracking Enumeration

#1501

Rank

#951MediumFrequency: 7.3%

Partition Array into Disjoint Intervals

#1502

Rank

#1757MediumFrequency: 7.3%

Minimum Jumps to Reach Home

#1503

Rank

#2203MediumFrequency: 7.3%

Number of Spaces Cleaning Robot Cleaned

#1504

Rank

#1104MediumFrequency: 7.3%

Coloring A Border

Array Depth-First Search Breadth-First Search Matrix

#1505

Rank

#2519MediumFrequency: 7.3%

Find The Original Array of Prefix Xor

#1506

Rank

#1503HardFrequency: 7.3%

Reducing Dishes

Array Dynamic Programming Greedy Sorting

#1507

Rank

#3827MediumFrequency: 7.3%

Implement Router

Array Hash Table Binary Search Design Queue Ordered Set

#1508

Rank

#2122EasyFrequency: 7.3%

Count Special Quadruplets

#1509

Rank

#3176EasyFrequency: 7.3%

Minimum Sum of Mountain Triplets I

#1510

Rank

#2283EasyFrequency: 7.3%

Sort Even and Odd Indices Independently

#1511

Rank

#1071EasyFrequency: 7.3%

Binary Prefix Divisible By 5

#1512

Rank

#2876EasyFrequency: 7.3%

Number of Employees Who Met the Target

#1513

Rank

#4153HardFrequency: 7.3%

Count Routes to Climb a Rectangular Grid

Array Dynamic Programming Matrix Prefix Sum

#1514

Rank

#3238HardFrequency: 7.3%

Minimum Cost to Convert String II

Array String Dynamic Programming Graph Theory Trie Shortest Path

#1515

Rank

#2832MediumFrequency: 7.3%

Find the Longest Equal Subarray

Array Hash Table Binary Search Sliding Window

#1516

Rank

#4119MediumFrequency: 7.3%

Minimum Distance Between Three Equal Elements II

#1517

Rank

#1984MediumFrequency: 7.3%

Maximum Distance Between a Pair of Values

Array Two Pointers Binary Search

#1518

Rank

#3742MediumFrequency: 7.3%

Maximum Number of Items From Sale I

#1519

Rank

#2192MediumFrequency: 7.3%

Minimum Cost Homecoming of a Robot in a Grid

#1520

Rank

#4007HardFrequency: 7.3%

Maximum Total Subarray Value II

Array Greedy Segment Tree Heap (Priority Queue)

#1521

Rank

#1294MediumFrequency: 7.3%

Range Frequency Queries

Array Hash Table Binary Search Design Segment Tree

#1522

Rank

#4008EasyFrequency: 7.3%

Restore Finishing Order

#1523

Rank

#1106HardFrequency: 7.3%

Escape a Large Maze

Array Hash Table Depth-First Search Breadth-First Search Bidirectional Search

#1524

Rank

#4075HardFrequency: 7.3%

Count Subarrays With Majority Element II

Array Hash Table Divide and Conquer Segment Tree Merge Sort Prefix Sum

#1525

Rank

#4318MediumFrequency: 7.3%

Valid Subarrays With Matching Sum Digits I

Array Hash Table Sliding Window Enumeration Prefix Sum

#1526

Rank

#3507MediumFrequency: 7.3%

Find the Count of Numbers Which Are Not Special

Array Math Number Theory

#1527

Rank

#1020MediumFrequency: 7.3%

Longest Turbulent Subarray

#1528

Rank

#2777EasyFrequency: 7.3%

Find the Distinct Difference Array

#1529

Rank

#1407MediumFrequency: 7.3%

Group the People Given the Group Size They Belong To

#1530

Rank

#3154EasyFrequency: 7.3%

Maximum Value of an Ordered Triplet I

#1531

Rank

#1683MediumFrequency: 7.3%

Maximum Number of Coins You Can Get

Array Math Greedy Sorting Game Theory

#1532

Rank

#491MediumFrequency: 7.3%

Non-decreasing Subsequences

Array Hash Table Backtracking Bit Manipulation

#1533

Rank

#720MediumFrequency: 7.3%

Longest Word in Dictionary

Array Hash Table String Trie Sorting

#1534

Rank

#1748MediumFrequency: 7.3%

Best Team With No Conflicts

Array Dynamic Programming Sorting Longest Increasing Subsequence

#1535

Rank

#1253MediumFrequency: 7.2%

Sort the Matrix Diagonally

#1536

Rank

#1349EasyFrequency: 7.2%

Check If It Is a Straight Line

#1537

Rank

#1769EasyFrequency: 7.2%

Get Maximum in Generated Array

#1538

Rank

#2148EasyFrequency: 7.2%

Minimum Number of Moves to Seat Everyone

Array Greedy Sorting Counting Sort

#1539

Rank

#2624EasyFrequency: 7.2%

Difference Between Element Sum and Digit Sum of an Array

#1540

Rank

#3485MediumFrequency: 7.2%

Maximize Score of Numbers in Ranges

#1541

Rank

#1945MediumFrequency: 7.2%

Finding the Users Active Minutes

#1542

Rank

#2027MediumFrequency: 7.2%

Maximum Number of Removable Characters

Array Two Pointers String Binary Search

#1543

Rank

#3737MediumFrequency: 7.2%

Paint House IV

#1544

Rank

#928EasyFrequency: 7.2%

Surface Area of 3D Shapes

Array Math Geometry Matrix

#1545

Rank

#2005EasyFrequency: 7.2%

Check if All the Integers in a Range Are Covered

#1546

Rank

#2869MediumFrequency: 7.2%

Longest Non-decreasing Subarray From Two Arrays

#1547

Rank

#3714MediumFrequency: 7.2%

Maximum and Minimum Sums of at Most Size K Subsequences

Array Math Dynamic Programming Sorting Combinatorics

#1548

Rank

#3260HardFrequency: 7.2%

Divide an Array Into Subarrays With Minimum Cost II

Array Hash Table Sliding Window Heap (Priority Queue)

#1549

Rank

#3104MediumFrequency: 7.2%

Happy Students

Array Sorting Enumeration

#1550

Rank

#3496MediumFrequency: 7.2%

Minimum Number of Seconds to Make Mountain Height Zero

Array Math Binary Search Greedy Heap (Priority Queue)

#1551

Rank

#3837MediumFrequency: 7.2%

Grid Teleportation Traversal

Array Hash Table Breadth-First Search Matrix

#1552

Rank

#891MediumFrequency: 7.2%

Score After Flipping Matrix

Array Greedy Bit Manipulation Matrix

#1553

Rank

#3820MediumFrequency: 7.2%

Number of Unique XOR Triplets II

Array Math Bit Manipulation Enumeration

#1554

Rank

#1969MediumFrequency: 5.5%

Maximum Number of Accepted Invitations

Array Depth-First Search Graph Theory Matrix Maximum Flow Maximum Matching Bipartite Graph Edmonds–Karp Algorithm MPM Algorithm Push-Relabel Algorithm Matching (Graph)Flow Network Dinic's Algorithm

#1555

Rank

#824EasyFrequency: 5.5%

Number of Lines To Write String

#1556

Rank

#1429HardFrequency: 5.5%

Verbal Arithmetic Puzzle

Array Math String Backtracking

#1557

Rank

#2727EasyFrequency: 5.5%

Number of Senior Citizens

#1558

Rank

#1691HardFrequency: 5.5%

Minimum Number of Days to Disconnect Island

Array Depth-First Search Breadth-First Search Matrix Strongly Connected Component Articulation Point

#1559

Rank

#828HardFrequency: 5.5%

Chalkboard XOR Game

Array Math Bit Manipulation Brainteaser Game Theory Zero-Sum Game Impartial Game

#1560

Rank

#919EasyFrequency: 5.5%

Projection Area of 3D Shapes

Array Math Geometry Matrix

#1561

Rank

#1419HardFrequency: 5.5%

Make Array Non-decreasing or Non-increasing

Array Dynamic Programming Greedy Heap (Priority Queue)

#1562

Rank

#1505EasyFrequency: 5.5%

Create Target Array in the Given Order

#1563

Rank

#2794MediumFrequency: 5.5%

Maximum Number of Moves in a Grid

#1564

Rank

#3579MediumFrequency: 5.5%

Maximum Possible Number by Binary Concatenation

Array Bit Manipulation Enumeration

#1565

Rank

#1831MediumFrequency: 5.5%

Ways to Split Array Into Three Subarrays

Array Two Pointers Binary Search Prefix Sum

#1566

Rank

#2533MediumFrequency: 5.5%

Bitwise XOR of All Pairings

Array Bit Manipulation Brainteaser

#1567

Rank

#3798HardFrequency: 5.5%

Longest Special Path II

Array Hash Table Tree Depth-First Search Prefix Sum

#1568

Rank

#1808MediumFrequency: 5.5%

Stone Game VII

Array Math Dynamic Programming Minimax Game Theory Zero-Sum Game

#1569

Rank

#2585EasyFrequency: 5.5%

Delete Greatest Value in Each Row

Array Sorting Heap (Priority Queue)Matrix Simulation

#1570

Rank

#1913HardFrequency: 5.5%

Make the XOR of All Segments Equal to Zero

Array Hash Table Dynamic Programming Bit Manipulation Counting

#1571

Rank

#842MediumFrequency: 5.5%

Card Flipping Game

#1572

Rank

#3708EasyFrequency: 5.5%

Zigzag Grid Traversal With Skip

#1573

Rank

#3882HardFrequency: 5.5%

Partition Array for Maximum XOR and AND

Array Math Greedy Bit Manipulation Enumeration

#1574

Rank

#3648HardFrequency: 5.5%

Find the Maximum Number of Fruits Collected

#1575

Rank

#3251EasyFrequency: 5.5%

Maximum Area of Longest Diagonal Rectangle

#1576

Rank

#3519EasyFrequency: 5.5%

Find the Number of Winning Players

#1577

Rank

#2269EasyFrequency: 5.5%

Count Elements With Strictly Smaller and Greater Elements

Array Sorting Counting

#1578

Rank

#3689HardFrequency: 5.5%

Maximum Area Rectangle With Point Constraints II

Array Math Binary Indexed Tree Segment Tree Geometry Sorting

#1579

Rank

#3934EasyFrequency: 5.5%

Coupon Code Validator

#1580

Rank

#3854HardFrequency: 5.5%

Maximum Profit from Trading Stocks with Discounts

#1581

Rank

#3877MediumFrequency: 5.5%

Two-Letter Card Game

Array Hash Table String Counting Enumeration

#1582

Rank

#944EasyFrequency: 5.5%

Smallest Range I

#1583

Rank

#3196HardFrequency: 5.5%

Apply Operations to Maximize Frequency Score

Array Binary Search Sliding Window Sorting Prefix Sum

#1584

Rank

#3151MediumFrequency: 5.5%

Minimum Processing Time

#1585

Rank

#3973EasyFrequency: 5.5%

Flip Square Submatrix Vertically

Array Two Pointers Matrix

#1586

Rank

#4256EasyFrequency: 5.5%

Construct Uniform Parity Array I

#1587

Rank

#4277MediumFrequency: 5.5%

Minimum Operations to Transform Array into Alternating Prime

Array Math Two Pointers Binary Search Sorting Number Theory

#1588

Rank

#4216EasyFrequency: 5.5%

Weighted Word Mapping

#1589

Rank

#814HardFrequency: 5.5%

Smallest Rotation with Highest Score

#1590

Rank

#822EasyFrequency: 5.5%

Unique Morse Code Words

#1591

Rank

#843MediumFrequency: 5%

Binary Trees With Factors

Array Hash Table Dynamic Programming Sorting

#1592

Rank

#2443MediumFrequency: 5%

Check if There is a Valid Partition For The Array

#1593

Rank

#2657HardFrequency: 5%

Minimum Time to Complete All Tasks

Array Binary Search Stack Greedy Sorting

#1594

Rank

#2724MediumFrequency: 5%

Convert an Array Into a 2D Array With Conditions

#1595

Rank

#2442EasyFrequency: 5%

Number of Arithmetic Triplets

Array Hash Table Two Pointers Enumeration

#1596

Rank

#1553MediumFrequency: 5%

Count Triplets That Can Form Two Arrays of Equal XOR

Array Hash Table Math Bit Manipulation Prefix Sum

#1597

Rank

#1572MediumFrequency: 5%

Subrectangle Queries

Array Design Matrix

#1598

Rank

#3247MediumFrequency: 5%

Number of Same-End Substrings

Array Hash Table String Counting Prefix Sum

#1599

Rank

#3495MediumFrequency: 5%

K-th Nearest Obstacle Queries

#1600

Rank

#2609MediumFrequency: 5%

Distinct Prime Factors of Product of Array

Array Hash Table Math Number Theory Prime Factorization Euclidean Algorithm Primality Test Greatest Common Divisor Sieve Theory Prime Number Sieve

#1601

Rank

#3533EasyFrequency: 5%

Snake in Matrix

#1602

Rank

#3560HardFrequency: 5%

Maximum Number of Moves to Kill All Pawns

Array Math Bit Manipulation Breadth-First Search Game Theory Bitmask

#1603

Rank

#3607MediumFrequency: 5%

Minimum Division Operations to Make Array Non Decreasing

Array Math Greedy Number Theory

#1604

Rank

#3487MediumFrequency: 5%

Find Maximum Removals From Source String

Array Hash Table Two Pointers String Dynamic Programming

#1605

Rank

#1378EasyFrequency: 5%

Cells with Odd Values in a Matrix

Array Math Simulation

#1606

Rank

#3309EasyFrequency: 5%

Count Prefix and Suffix Pairs I

Array String Trie Rolling Hash String Matching Hash Function

#1607

Rank

#3716MediumFrequency: 5%

Longest Subsequence With Decreasing Adjacent Difference

#1608

Rank

#2412EasyFrequency: 5%

Minimum Amount of Time to Fill Cups

#1609

Rank

#3785MediumFrequency: 5%

Find the Number of Copy Arrays

#1610

Rank

#3418MediumFrequency: 5%

Count Pairs That Form a Complete Day II

#1611

Rank

#2787MediumFrequency: 5%

Movement of Robots

Array Brainteaser Sorting Prefix Sum

#1612

Rank

#3795MediumFrequency: 5%

Zero Array Transformation IV

#1613

Rank

#1433HardFrequency: 5%

Encrypt and Decrypt Strings

Array Hash Table String Design Trie

#1614

Rank

#2420HardFrequency: 5%

Closest Node to Path in Tree

Array Tree Depth-First Search Breadth-First Search

#1615

Rank

#3712MediumFrequency: 5%

Minimum Cost to Make Arrays Identical

#1616

Rank

#2722EasyFrequency: 5%

Prime In Diagonal

Array Math Matrix Number Theory

#1617

Rank

#3833HardFrequency: 5%

Merge Operations for Minimum Travel Time

#1618

Rank

#2103MediumFrequency: 5%

Find All Groups of Farmland

Array Depth-First Search Breadth-First Search Matrix

#1619

Rank

#1685HardFrequency: 5%

Stone Game V

Array Math Dynamic Programming Game Theory

#1620

Rank

#3591MediumFrequency: 5%

Shift Distance Between Two Strings

#1621

Rank

#3723EasyFrequency: 5%

Sum of Good Numbers

#1622

Rank

#499HardFrequency: 5%

The Maze III

Array String Depth-First Search Breadth-First Search Graph Theory Heap (Priority Queue)Matrix Shortest Path Dijkstra's Algorithm Heuristic Search A* Search

#1623

Rank

#3868MediumFrequency: 5%

Find Maximum Area of a Triangle

Array Hash Table Math Greedy Geometry Enumeration

#1624

Rank

#3289HardFrequency: 5%

Earliest Second to Mark Indices II

Array Binary Search Greedy Heap (Priority Queue)

#1625

Rank

#575EasyFrequency: 5%

Distribute Candies

#1626

Rank

#3324EasyFrequency: 5%

Split the Array

#1627

Rank

#2113MediumFrequency: 5%

Find the Kth Largest Integer in the Array

Array String Divide and Conquer Sorting Heap (Priority Queue)Quickselect

#1628

Rank

#3823MediumFrequency: 5%

Count Islands With Total Value Divisible by K

Array Depth-First Search Breadth-First Search Union-Find Matrix

#1629

Rank

#3907MediumFrequency: 5%

Count Prime-Gap Balanced Subarrays

Array Math Queue Sliding Window Number Theory Monotonic Queue

#1630

Rank

#3979MediumFrequency: 5%

Partition Array Into K-Distinct Groups

#1631

Rank

#3957HardFrequency: 5%

Sum of Perfect Square Ancestors

Array Hash Table Math Tree Depth-First Search Counting Number Theory

#1632

Rank

#3776MediumFrequency: 5%

Find Minimum Cost to Remove Array Elements

#1633

Rank

#2765HardFrequency: 5%

Make Array Empty

Array Binary Search Greedy Binary Indexed Tree Segment Tree Sorting Ordered Set

#1634

Rank

#1575MediumFrequency: 5%

Maximum Area of a Piece of Cake After Horizontal and Vertical Cuts

#1635

Rank

#3705EasyFrequency: 5%

Find the Largest Almost Missing Integer

#1636

Rank

#3869EasyFrequency: 5%

Smallest Index With Digit Sum Equal to Index

#1637

Rank

#2844EasyFrequency: 5%

Sum of Squares of Special Elements

#1638

Rank

#2589EasyFrequency: 5%

Maximum Value of a String in an Array

#1639

Rank

#1299MediumFrequency: 5%

K-Concatenation Maximum Sum

#1640

Rank

#1928MediumFrequency: 5%

Number of Orders in the Backlog

#1641

Rank

#2872MediumFrequency: 5%

Largest Element in an Array after Merge Operations

#1642

Rank

#3913MediumFrequency: 5%

Partition Array to Minimize XOR

Array Dynamic Programming Bit Manipulation Prefix Sum

#1643

Rank

#4176MediumFrequency: 5%

Minimum K to Reduce Array Within Limit

#1644

Rank

#2557MediumFrequency: 5%

Number of Subarrays With LCM Equal to K

Array Math Number Theory

#1645

Rank

#4101MediumFrequency: 5%

Maximum Product of Three Elements After One Replacement

Array Math Greedy Sorting

#1646

Rank

#1705MediumFrequency: 5%

Count Unhappy Friends

#1647

Rank

#2445MediumFrequency: 5%

Reachable Nodes With Restrictions

Array Hash Table Tree Depth-First Search Breadth-First Search Union-Find Graph Theory

#1648

Rank

#4035HardFrequency: 5%

Maximum Partition Factor

Array Binary Search Depth-First Search Breadth-First Search Union-Find Graph Theory

#1649

Rank

#2201HardFrequency: 5%

Valid Arrangement of Pairs

Array Depth-First Search Graph Theory Eulerian Circuit Eulerian Path Semi-Eulerian Graph

#1650

Rank

#4115EasyFrequency: 5%

Minimum Distance Between Three Equal Elements I

#1651

Rank

#4205MediumFrequency: 5%

Minimum XOR Path in a Grid

Array Dynamic Programming Bit Manipulation Matrix

#1652

Rank

#3556HardFrequency: 5%

Final Array State After K Multiplication Operations II

#1653

Rank

#1507MediumFrequency: 5%

Check if There is a Valid Path in a Grid

Array Depth-First Search Breadth-First Search Union-Find Matrix

#1654

Rank

#3345HardFrequency: 5%

Find the Sum of the Power of All Subsequences

Array Dynamic Programming Knapsack Problem 0-1 Knapsack

#1655

Rank

#3878HardFrequency: 5%

Maximize Count of Distinct Primes After Split

Array Hash Table Math Segment Tree Number Theory Ordered Set

#1656

Rank

#2480EasyFrequency: 5%

Find Subarrays With Equal Sum

#1657

Rank

#1830MediumFrequency: 5%

Count Good Meals

#1658

Rank

#1342MediumFrequency: 5%

Queens That Can Attack the King

#1659

Rank

#3163EasyFrequency: 5%

Subarrays Distinct Element Sum of Squares I

Array Hash Table Segment Tree

#1660

Rank

#2756EasyFrequency: 5%

Buy Two Chocolates

#1661

Rank

#1343HardFrequency: 5%

Dice Roll Simulation

#1662

Rank

#2542EasyFrequency: 5%

Average Value of Even Numbers That Are Divisible by Three

#1663

Rank

#1839EasyFrequency: 5%

Decode XORed Array

#1664

Rank

#3500HardFrequency: 5%

Minimum Cost for Cutting Cake II

#1665

Rank

#4150EasyFrequency: 5%

Sort Integers by Binary Reflection

#1666

Rank

#901MediumFrequency: 5%

Advantage Shuffle

#1667

Rank

#2114MediumFrequency: 5%

Minimum Number of Work Sessions to Finish the Tasks

Array Dynamic Programming Backtracking Bit Manipulation Bitmask

#1668

Rank

#2539HardFrequency: 5%

Minimum Number of Operations to Make Arrays Similar

#1669

Rank

#3444MediumFrequency: 5%

Find the Number of Good Pairs II

#1670

Rank

#3478HardFrequency: 5%

Check if the Rectangle Corner Is Reachable

Array Math Depth-First Search Breadth-First Search Union-Find Geometry

#1671

Rank

#3313HardFrequency: 5%

Maximum Strength of K Disjoint Subarrays

#1672

Rank

#3632EasyFrequency: 5%

Button with Longest Push Time

#1673

Rank

#2402MediumFrequency: 5%

Maximum XOR After Operations

#1674

Rank

#3562HardFrequency: 5%

Maximum Score of Non-overlapping Intervals

#1675

Rank

#3531HardFrequency: 5%

Minimum Amount of Damage Dealt to Bob

#1676

Rank

#3686MediumFrequency: 5%

Count Beautiful Splits in an Array

#1677

Rank

#3800MediumFrequency: 5%

Longest Common Prefix Between Adjacent Strings After Removals

#1678

Rank

#489HardFrequency: 5%

Kth Smallest Instructions

Array Math Dynamic Programming Combinatorics

#1679

Rank

#3658HardFrequency: 5%

Minimize the Maximum Adjacent Element Difference

#1680

Rank

#2810MediumFrequency: 5%

Collecting Chocolates

#1681

Rank

#2631MediumFrequency: 5%

Sort the Students by Their Kth Score

#1682

Rank

#2698EasyFrequency: 5%

Find the Array Concatenation Value

#1683

Rank

#598EasyFrequency: 5%

Range Addition II

#1684

Rank

#4160MediumFrequency: 5%

Maximum Sum of Three Numbers Divisible by Three

#1685

Rank

#2459EasyFrequency: 5%

Minimum Hours of Training to Win a Competition

#1686

Rank

#3807MediumFrequency: 5%

Find Maximum Value in a Constrained Sequence

#1687

Rank

#2920MediumFrequency: 5%

Minimum Seconds to Equalize a Circular Array

#1688

Rank

#1164EasyFrequency: 5%

Missing Number In Arithmetic Progression

#1689

Rank

#4152MediumFrequency: 5%

Minimum Subarray Length With Distinct Sum At Least K

#1690

Rank

#2084MediumFrequency: 5%

Maximum Number of Weeks for Which You Can Work

#1691

Rank

#2705MediumFrequency: 5%

Minimum Impossible OR

Array Bit Manipulation Brainteaser

#1692

Rank

#4122MediumFrequency: 5%

Final Element After Subarray Deletions

Array Math Brainteaser Game Theory

#1693

Rank

#2151MediumFrequency: 5%

The Time When the Network Becomes Idle

Array Breadth-First Search Graph Theory

#1694

Rank

#3809MediumFrequency: 5%

Properties Graph

Array Hash Table Depth-First Search Breadth-First Search Union-Find Graph Theory

#1695

Rank

#3976HardFrequency: 5%

Minimum Cost to Buy Apples II

Array Graph Theory Heap (Priority Queue)Shortest Path

#1696

Rank

#376MediumFrequency: 5%

Wiggle Subsequence

#1697

Rank

#1794HardFrequency: 5%

Minimize Deviation in Array

Array Greedy Heap (Priority Queue)Ordered Set

#1698

Rank

#2476EasyFrequency: 5%

Check Distances Between Same Letters

#1699

Rank

#3755MediumFrequency: 5%

Maximum Product of First and Last Elements of a Subsequence

#1700

Rank

#2592HardFrequency: 5%

Minimum Total Cost to Make Arrays Unequal

#1701

Rank

#2670MediumFrequency: 5%

Make K-Subarray Sums Equal

Array Math Greedy Sorting Number Theory

#1702

Rank

#4299EasyFrequency: 5%

Concatenate Array With Reverse

#1703

Rank

#4059MediumFrequency: 5%

Design Exam Scores Tracker

Array Binary Search Design Prefix Sum

#1704

Rank

#2815MediumFrequency: 5%

Find Maximal Uncovered Ranges

#1705

Rank

#3142MediumFrequency: 5%

Longest Unequal Adjacent Groups Subsequence II

#1706

Rank

#3843MediumFrequency: 5%

Partition Array into Two Equal Product Subsets

Array Bit Manipulation Recursion Enumeration

#1707

Rank

#4039EasyFrequency: 5%

Compute Decimal Representation

#1708

Rank

#1775EasyFrequency: 5%

Design an Ordered Stream

Array Hash Table Design Data Stream

#1709

Rank

#3928MediumFrequency: 5%

Split and Merge Array Transformation

#1710

Rank

#2549HardFrequency: 5%

Next Greater Element IV

Array Binary Search Stack Sorting Heap (Priority Queue)Monotonic Stack

#1711

Rank

#4312EasyFrequency: 5%

Limit Occurrences in Sorted Array

#1712

Rank

#1944EasyFrequency: 5%

Truncate Sentence

#1713

Rank

#4002HardFrequency: 5%

Count Subarrays With K Distinct Integers