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Sorting Interview Questions

Master 433 sorting problems frequently asked in technical interviews. These questions test your understanding of sortingconcepts and are essential for coding interview success.

433

Total Problems

84

Easy

251

Medium

98

Hard

Related Topics

Array Greedy Hash Table Binary Search Heap (Priority Queue)Two Pointers String Math

#1306EasyFrequency: 94.7%

Minimum Absolute Difference

Asked at PayPal

#1

Rank

#314MediumFrequency: 93.4%

Binary Tree Vertical Order Traversal

Hash Table Tree Depth-First Search Breadth-First Search Sorting Binary Tree

#2

Rank

#215MediumFrequency: 93.3%

Kth Largest Element in an Array

Array Divide and Conquer Sorting Heap (Priority Queue)Quickselect

#3

Rank

#1352HardFrequency: 93%

Maximum Profit in Job Scheduling

Asked at Airbnb

Array Binary Search Dynamic Programming Sorting

#4

Rank

#694MediumFrequency: 86.6%

Number of Distinct Islands

Asked at TikTok

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

#5

Rank

#88EasyFrequency: 86.3%

Merge Sorted Array

Array Two Pointers Sorting

#6

Rank

#1019EasyFrequency: 85.8%

Squares of a Sorted Array

Array Two Pointers Sorting

#7

Rank

#56MediumFrequency: 84.6%

Merge Intervals

Array Sorting Quicksort

#8

Rank

#253MediumFrequency: 83.8%

Meeting Rooms II

Asked at TikTok

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

#9

Rank

#1397MediumFrequency: 82.5%

Search Suggestions System

Asked at DoorDash

Array String Binary Search Trie Sorting Heap (Priority Queue)

#10

Rank

#3231MediumFrequency: 82%

Minimum Number of Coins to be Added

Asked at Flipkart

Array Greedy Sorting

#11

Rank

#49MediumFrequency: 81.6%

Group Anagrams

Asked at Oracle

Array Hash Table String Sorting

#12

Rank

#347MediumFrequency: 81.3%

Top K Frequent Elements

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

#13

Rank

#15MediumFrequency: 78.3%

3Sum

Asked at Amazon

Array Two Pointers Sorting

#14

Rank

#778MediumFrequency: 78.3%

Reorganize String

Asked at Amazon

Hash Table String Greedy Sorting Heap (Priority Queue)Counting

#15

Rank

#1014MediumFrequency: 77.1%

K Closest Points to Origin

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

#16

Rank

#2640MediumFrequency: 76%

Maximum Number of Integers to Choose From a Range I

Asked at PayPal

Array Hash Table Binary Search Greedy Sorting

#17

Rank

#1165MediumFrequency: 76%

Meeting Scheduler

Asked at PayPal

Array Two Pointers Sorting

#18

Rank

#1962MediumFrequency: 74.6%

Single-Threaded CPU

Asked at DoorDash

Array Sorting Heap (Priority Queue)

#19

Rank

#2702MediumFrequency: 73.2%

Maximum Number of Integers to Choose From a Range II

Asked at PayPal

Array Binary Search Greedy Sorting

#20

Rank

#1695MediumFrequency: 73.2%

Maximum Sum Obtained of Any Permutation

Asked at PayPal

Array Greedy Sorting Prefix Sum

#21

Rank

#807MediumFrequency: 72.8%

Custom Sort String

Hash Table String Sorting

#22

Rank

#169EasyFrequency: 70.4%

Majority Element

Asked at Microsoft

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

#23

Rank

#242EasyFrequency: 69.8%

Valid Anagram

Asked at Infosys

Hash Table String Sorting

#24

Rank

#3779MediumFrequency: 69.8%

Eat Pizzas!

Asked at Infosys

Array Greedy Sorting

#25

Rank

#3778EasyFrequency: 69.8%

Transform Array by Parity

Asked at Infosys

Array Sorting Counting

#26

Rank

#1029HardFrequency: 69.1%

Vertical Order Traversal of a Binary Tree

Hash Table Tree Depth-First Search Breadth-First Search Sorting Binary Tree

#27

Rank

#761HardFrequency: 67.9%

Employee Free Time

Asked at Airbnb

Array Sweep Line Sorting Heap (Priority Queue)

#28

Rank

#628EasyFrequency: 67.8%

Maximum Product of Three Numbers

Asked at Salesforce

Array Math Sorting

#29

Rank

#853MediumFrequency: 67.4%

Most Profit Assigning Work

Asked at DoorDash

Array Two Pointers Binary Search Greedy Sorting

#30

Rank

#360MediumFrequency: 66.5%

Sort Transformed Array

Asked at LinkedIn

Array Math Two Pointers Sorting

#31

Rank

#3317MediumFrequency: 66.4%

Maximum Palindromes After Operations

Asked at Salesforce

Array Hash Table String Greedy Sorting Counting

#32

Rank

#295HardFrequency: 66.4%

Find Median from Data Stream

Asked at PayPal

Two Pointers Design Sorting Heap (Priority Queue)Data Stream

#33

Rank

#588HardFrequency: 65.6%

Design In-Memory File System

Asked at DoorDash

Hash Table String Design Trie Sorting

#34

Rank

#1053MediumFrequency: 65.5%

Minimize Rounding Error to Meet Target

Asked at Airbnb

Array Math String Greedy Sorting

#35

Rank

#217EasyFrequency: 65.5%

Contains Duplicate

Asked at Airbnb

Array Hash Table Sorting

#36

Rank

#220HardFrequency: 65.5%

Contains Duplicate III

Asked at Airbnb

Array Sliding Window Sorting Bucket Sort Ordered Set

#37

Rank

#3982HardFrequency: 65.2%

Maximum Walls Destroyed by Robots

Asked at Infosys

Array Binary Search Dynamic Programming Sorting

#38

Rank

#658MediumFrequency: 64.6%

Find K Closest Elements

Asked at DoorDash

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

#39

Rank

#75MediumFrequency: 64.1%

Sort Colors

Asked at Microsoft

Array Two Pointers Sorting Quicksort Bubble Sort

#40

Rank

#621MediumFrequency: 63.1%

Task Scheduler

Asked at Amazon

Array Hash Table Greedy Sorting Heap (Priority Queue)Counting

#41

Rank

#1085MediumFrequency: 63.1%

The Earliest Moment When Everyone Become Friends

Array Union-Find Sorting

#42

Rank

#1108MediumFrequency: 62.6%

Analyze User Website Visit Pattern

Asked at Amazon

Array Hash Table String Sorting

#43

Rank

#2502EasyFrequency: 62.5%

Sort the People

Asked at Infosys

Array Hash Table String Sorting

#44

Rank

#2554HardFrequency: 62.5%

Minimum Total Distance Traveled

Asked at Infosys

Array Dynamic Programming Sorting

#45

Rank

#2696MediumFrequency: 62.5%

The Number of Beautiful Subsets

Asked at Infosys

Array Hash Table Math Dynamic Programming Backtracking Sorting Combinatorics

#46

Rank

#1930MediumFrequency: 62.5%

Maximum Number of Consecutive Values You Can Make

Asked at Infosys

Array Greedy Sorting

#47

Rank

#1478MediumFrequency: 62.2%

Maximum Number of Events That Can Be Attended

Asked at PayPal

Array Greedy Sorting Heap (Priority Queue)

#48

Rank

#3881MediumFrequency: 61.5%

Minimize Maximum Component Cost

Asked at Salesforce

Binary Search Union-Find Graph Theory Sorting

#49

Rank

#721MediumFrequency: 61.4%

Accounts Merge

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

#50

Rank

#2479HardFrequency: 61.4%

Meeting Rooms III

Asked at TikTok

Array Hash Table Sorting Heap (Priority Queue)Simulation

#51

Rank

#18MediumFrequency: 59.4%

4Sum

Asked at Amazon

Array Two Pointers Sorting

#52

Rank

#692MediumFrequency: 59.1%

Top K Frequent Words

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

#53

Rank

#2699MediumFrequency: 57.5%

Count the Number of Fair Pairs

Asked at Salesforce

Array Two Pointers Binary Search Sorting

#54

Rank

#763HardFrequency: 57.5%

Special Binary String

Asked at Salesforce

String Divide and Conquer Sorting

#55

Rank

#259MediumFrequency: 57%

3Sum Smaller

Asked at PayPal

Array Two Pointers Binary Search Sorting

#56

Rank

#1308MediumFrequency: 57%

Smallest String With Swaps

Asked at PayPal

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

#57

Rank

#378MediumFrequency: 55.9%

Kth Smallest Element in a Sorted Matrix

Array Binary Search Sorting Heap (Priority Queue)Matrix

#58

Rank

#4071MediumFrequency: 55.8%

Word Squares II

Asked at Oracle

Array String Backtracking Sorting Enumeration

#59

Rank

#1137EasyFrequency: 55.1%

Height Checker

Asked at Salesforce

Array Sorting Counting Sort Bubble Sort

#60

Rank

#3433MediumFrequency: 55.1%

Maximum Number That Makes Result of Bitwise AND Zero

Asked at Salesforce

String Greedy Sorting

#61

Rank

#3958MediumFrequency: 55.1%

Minimum Removals to Balance Array

Asked at Salesforce

Array Binary Search Sliding Window Sorting

#62

Rank

#268EasyFrequency: 54.4%

Missing Number

Asked at Amazon

Array Hash Table Math Binary Search Bit Manipulation Sorting

#63

Rank

#2543MediumFrequency: 54.4%

Most Popular Video Creator

Asked at TikTok

Array Hash Table String Sorting Heap (Priority Queue)

#64

Rank

#2651MediumFrequency: 53.4%

Count Ways to Group Overlapping Ranges

Asked at Oracle

#65

Rank

#472HardFrequency: 53%

Concatenated Words

Asked at Amazon

Array String Dynamic Programming Depth-First Search Trie Sorting

#66

Rank

#632HardFrequency: 52.9%

Smallest Range Covering Elements from K Lists

Asked at Flipkart

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

#67

Rank

#976MediumFrequency: 52.9%

Minimum Area Rectangle

Asked at Flipkart

Array Hash Table Math Geometry Sorting

#68

Rank

#354HardFrequency: 52.7%

Russian Doll Envelopes

Asked at Google

Array Binary Search Dynamic Programming Sorting Longest Increasing Subsequence

#69

Rank

#532MediumFrequency: 52.4%

K-diff Pairs in an Array

Asked at Salesforce

Array Hash Table Two Pointers Binary Search Sorting

#70

Rank

#3277HardFrequency: 52.1%

Find the Number of Ways to Place People II

Array Math Geometry Sorting Enumeration

#71

Rank

#1966MediumFrequency: 51.8%

Frequency of the Most Frequent Element

Asked at Infosys

Array Binary Search Greedy Sliding Window Sorting Prefix Sum

#72

Rank

#16MediumFrequency: 51.4%

3Sum Closest

Asked at Amazon

Array Two Pointers Sorting

#73

Rank

#179MediumFrequency: 51.4%

Largest Number

Asked at Amazon

Array String Greedy Sorting

#74

Rank

#252EasyFrequency: 51.4%

Meeting Rooms

Asked at TikTok

Array Sorting Quicksort

#75

Rank

#2075MediumFrequency: 51.4%

Brightest Position on Street

Asked at TikTok

Array Sorting Prefix Sum Ordered Set

#76

Rank

#2725MediumFrequency: 51.3%

Mice and Cheese

Asked at DoorDash

Array Greedy Sorting Heap (Priority Queue)

#77

Rank

#349EasyFrequency: 51.1%

Intersection of Two Arrays

Asked at Amazon

Array Hash Table Two Pointers Binary Search Sorting

#78

Rank

#852MediumFrequency: 50.5%

Friends Of Appropriate Ages

Array Two Pointers Binary Search Sorting

#79

Rank

#982MediumFrequency: 50.3%

Minimum Increment to Make Array Unique

Asked at PayPal

Array Greedy Sorting Counting

#80

Rank

#894HardFrequency: 47.5%

Random Pick with Blacklist

Array Hash Table Math Binary Search Sorting Randomized

#81

Rank

#1486EasyFrequency: 47.5%

Find the Distance Value Between Two Arrays

Array Two Pointers Binary Search Sorting

#82

Rank

#1946MediumFrequency: 47.5%

Minimum Absolute Sum Difference

Array Binary Search Sorting Ordered Set

#83

Rank

#2085MediumFrequency: 47.5%

Array With Elements Not Equal to Average of Neighbors

Array Greedy Sorting

#84

Rank

#2331EasyFrequency: 47.5%

Intersection of Multiple Arrays

Array Hash Table Sorting Counting

#85

Rank

#2418MediumFrequency: 47.5%

Minimum Sum of Squared Difference

Array Binary Search Greedy Sorting Heap (Priority Queue)

#86

Rank

#3715MediumFrequency: 47.3%

Maximum Coins From K Consecutive Bags

Asked at Amazon

Array Binary Search Greedy Sliding Window Sorting Prefix Sum

#87

Rank

#47MediumFrequency: 46.9%

Permutations II

Asked at LinkedIn

Array Backtracking Sorting

#88

Rank

#948MediumFrequency: 46.7%

Sort an Array

Asked at Infosys

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

#89

Rank

#2366MediumFrequency: 46.7%

Maximum Bags With Full Capacity of Rocks

Asked at Infosys

Array Greedy Sorting

#90

Rank

#2436EasyFrequency: 46.5%

Make Array Zero by Subtracting Equal Amounts

Asked at Amazon

Array Hash Table Greedy Sorting Heap (Priority Queue)Simulation

#91

Rank

#1539MediumFrequency: 46.5%

Diagonal Traverse II

Array Sorting Heap (Priority Queue)

#92

Rank

#148MediumFrequency: 46%

Sort List

Asked at Amazon

Linked List Two Pointers Divide and Conquer Sorting Merge Sort

#93

Rank

#1829EasyFrequency: 45.7%

Maximum Units on a Truck

Asked at Salesforce

Array Greedy Sorting

#94

Rank

#2423HardFrequency: 44.7%

Minimum Deletions to Make Array Divisible

Asked at LinkedIn

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

#95

Rank

#442MediumFrequency: 44%

Find All Duplicates in an Array

Asked at TikTok

Array Hash Table Sorting

#96

Rank

#581MediumFrequency: 44%

Shortest Unsorted Continuous Subarray

Asked at TikTok

Array Two Pointers Stack Greedy Sorting Monotonic Stack

#97

Rank

#1184MediumFrequency: 43.2%

Car Pooling

Asked at Flipkart

Array Sorting Heap (Priority Queue)Simulation Prefix Sum

#98

Rank

#1499HardFrequency: 43.2%

Maximum Performance of a Team

Asked at Flipkart

Array Greedy Sorting Heap (Priority Queue)

#99

Rank

#332HardFrequency: 43.2%

Reconstruct Itinerary

Asked at Flipkart

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

#100

Rank

#1675MediumFrequency: 43.2%

Magnetic Force Between Two Balls

Asked at Flipkart

Array Binary Search Sorting

#101

Rank

#2846HardFrequency: 43.2%

Robot Collisions

Asked at Flipkart

Array Stack Sorting Simulation

#102

Rank

#451MediumFrequency: 43.2%

Sort Characters By Frequency

Asked at Flipkart

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

#103

Rank

#917MediumFrequency: 43.2%

Boats to Save People

Asked at Flipkart

Array Two Pointers Greedy Sorting Timsort

#104

Rank

#726HardFrequency: 43.2%

Number of Atoms

Asked at Flipkart

Hash Table String Stack Sorting

#105

Rank

#435MediumFrequency: 43.1%

Non-overlapping Intervals

Asked at Amazon

Array Dynamic Programming Greedy Sorting

#106

Rank

#296HardFrequency: 43.1%

Best Meeting Point

Asked at DoorDash

Array Math Sorting Matrix

#107

Rank

#2334HardFrequency: 43%

Number of Flowers in Full Bloom

Asked at Databricks

Array Hash Table Binary Search Sorting Prefix Sum Ordered Set

#108

Rank

#229MediumFrequency: 42.5%

Majority Element II

Asked at Amazon

Array Hash Table Sorting Counting Boyer–Moore Majority Vote Algorithm

#109

Rank

#389EasyFrequency: 42%

Find the Difference

Asked at Google

Hash Table String Bit Manipulation Sorting

#110

Rank

#808MediumFrequency: 41.6%

Number of Matching Subsequences

Array Hash Table String Binary Search Dynamic Programming Trie Sorting

#111

Rank

#645EasyFrequency: 41.4%

Set Mismatch

Asked at Amazon

Array Hash Table Bit Manipulation Sorting

#112

Rank

#2327EasyFrequency: 41.2%

Largest Number After Digit Swaps by Parity

Asked at Salesforce

Sorting Heap (Priority Queue)

#113

Rank

#2581MediumFrequency: 40.9%

Divide Players Into Teams of Equal Skill

Asked at PayPal

Array Hash Table Two Pointers Sorting

#114

Rank

#1129MediumFrequency: 40.9%

Longest String Chain

Asked at PayPal

Array Hash Table Two Pointers String Dynamic Programming Sorting

#115

Rank

#455EasyFrequency: 40.2%

Assign Cookies

Asked at Amazon

Array Two Pointers Greedy Sorting Quicksort

#116

Rank

#368MediumFrequency: 39.5%

Largest Divisible Subset

Asked at Google

Array Math Dynamic Programming Sorting

#117

Rank

#1626EasyFrequency: 39.5%

Can Make Arithmetic Progression From Sequence

Asked at Google

#118

Rank

#274MediumFrequency: 39.4%

H-Index

Asked at Microsoft

Array Sorting Counting Sort

#119

Rank

#611MediumFrequency: 39.4%

Valid Triangle Number

Asked at LinkedIn

Array Two Pointers Binary Search Greedy Sorting

#120

Rank

#642HardFrequency: 39.1%

Design Search Autocomplete System

Asked at TikTok

String Depth-First Search Design Trie Sorting Heap (Priority Queue)Data Stream

#121

Rank

#218HardFrequency: 37.9%

The Skyline Problem

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

#122

Rank

#2588HardFrequency: 37.9%

Maximum Number of Points From Grid Queries

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

#123

Rank

#4077MediumFrequency: 37.4%

Lexicographically Smallest Negated Permutation that Sums to Target

Asked at Amazon

Array Math Two Pointers Greedy Sorting

#124

Rank

#1017HardFrequency: 35.8%

Odd Even Jump

Asked at Google

Array Dynamic Programming Stack Sorting Monotonic Stack Ordered Set

#125

Rank

#941EasyFrequency: 35%

Sort Array By Parity

Array Two Pointers Sorting

#126

Rank

#1076MediumFrequency: 35%

Brace Expansion

String Backtracking Stack Breadth-First Search Sorting

#127

Rank

#452MediumFrequency: 34.3%

Minimum Number of Arrows to Burst Balloons

Asked at Microsoft

Array Greedy Sorting

#128

Rank

#2162HardFrequency: 34.2%

Partition Array Into Two Arrays to Minimize Sum Difference

Asked at Google

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

#129

Rank

#1256EasyFrequency: 33.7%

Rank Transform of an Array

Asked at Google

Array Hash Table Sorting

#130

Rank

#862MediumFrequency: 33.7%

Find And Replace in String

Asked at Google

Array Hash Table String Sorting

#131

Rank

#2118MediumFrequency: 33.5%

Maximum Earnings From Taxi

Array Hash Table Binary Search Dynamic Programming Sorting

#132

Rank

#1613HardFrequency: 33.5%

Find Critical and Pseudo-Critical Edges in Minimum Spanning Tree

Union-Find Graph Theory Sorting Minimum Spanning Tree Strongly Connected Component Prim's Algorithm Kruskal's Algorithm Borůvka's Algorithm

#133

Rank

#2681HardFrequency: 33.3%

Put Marbles in Bags

Asked at Amazon

Array Greedy Sorting Heap (Priority Queue)

#134

Rank

#3410HardFrequency: 33.3%

Find Longest Self-Contained Substring

Asked at Amazon

Hash Table String Sorting

#135

Rank

#2538HardFrequency: 33.3%

Minimum Cost to Make Array Equal

Asked at Oracle

Array Binary Search Greedy Sorting Prefix Sum

#136

Rank

#1272MediumFrequency: 33.3%

Invalid Transactions

Asked at Oracle

Array Hash Table String Sorting

#137

Rank

#3425MediumFrequency: 32.8%

Maximum Number of Potholes That Can Be Fixed

Asked at Microsoft

String Greedy Sorting

#138

Rank

#2417MediumFrequency: 32.4%

The Latest Time to Catch a Bus

Asked at Google

Array Two Pointers Binary Search Sorting

#139

Rank

#3430MediumFrequency: 32.4%

Count Days Without Meetings

Asked at Google

#140

Rank

#3321EasyFrequency: 32.4%

Type of Triangle

Asked at Google

Array Math Sorting Polygons

#141

Rank

#414EasyFrequency: 32.3%

Third Maximum Number

Asked at Amazon

#142

Rank

#974MediumFrequency: 32.3%

Reorder Data in Log Files

Asked at Amazon

Array String Sorting

#143

Rank

#2919HardFrequency: 32.3%

Maximum Number of Groups With Increasing Length

Asked at Amazon

Array Math Binary Search Greedy Sorting

#144

Rank

#1771MediumFrequency: 32.3%

Sell Diminishing-Valued Colored Balls

Asked at Amazon

Array Math Binary Search Greedy Sorting Heap (Priority Queue)

#145

Rank

#883MediumFrequency: 31.8%

Car Fleet

Asked at Google

Array Stack Sorting Monotonic Stack

#146

Rank

#1669HardFrequency: 31.3%

Minimum Cost to Cut a Stick

Asked at Amazon

Array Dynamic Programming Sorting

#147

Rank

#1621MediumFrequency: 31.3%

Number of Subsequences That Satisfy the Given Sum Condition

Asked at Infosys

Array Two Pointers Binary Search Sorting

#148

Rank

#1095MediumFrequency: 31.3%

Two City Scheduling

Asked at Infosys

Array Greedy Sorting Hungarian Algorithm Successive Shortest Path Algorithm

#149

Rank

#1047EasyFrequency: 31.3%

Maximize Sum Of Array After K Negations

Asked at Infosys

Array Greedy Sorting

#150

Rank

#502HardFrequency: 31.1%

IPO

Asked at Microsoft

Array Greedy Sorting Heap (Priority Queue)

#151

Rank

#2016MediumFrequency: 31.1%

Reduction Operations to Make the Array Elements Equal

Asked at Microsoft

#152

Rank

#3236EasyFrequency: 31.1%

Smallest Missing Integer Greater Than Sequential Prefix Sum

Asked at Microsoft

Array Hash Table Sorting

#153

Rank

#2117MediumFrequency: 30.4%

Find Original Array From Doubled Array

Asked at Google

Array Hash Table Greedy Sorting

#154

Rank

#1977HardFrequency: 30.4%

Minimum Interval to Include Each Query

Asked at Google

Array Binary Search Sweep Line Sorting Heap (Priority Queue)

#155

Rank

#561EasyFrequency: 30.2%

Array Partition

Asked at Amazon

Array Greedy Sorting Counting Sort

#156

Rank

#1468EasyFrequency: 29.7%

Check If N and Its Double Exist

Asked at Google

Array Hash Table Two Pointers Binary Search Sorting

#157

Rank

#3334EasyFrequency: 29.5%

Apple Redistribution into Boxes

Array Greedy Sorting

#158

Rank

#1742EasyFrequency: 29.3%

Widest Vertical Area Between Two Points Containing No Points

Asked at Microsoft

#159

Rank

#1770MediumFrequency: 29.3%

Minimum Deletions to Make Character Frequencies Unique

Asked at Microsoft

Hash Table String Greedy Sorting

#160

Rank

#2333MediumFrequency: 29.1%

Count Number of Rectangles Containing Each Point

Asked at Amazon

Array Hash Table Binary Search Binary Indexed Tree Sorting

#161

Rank

#2473MediumFrequency: 29.1%

Max Sum of a Pair With Equal Sum of Digits

Asked at Amazon

Array Hash Table Sorting Heap (Priority Queue)

#162

Rank

#2646MediumFrequency: 29.1%

Kth Largest Sum in a Binary Tree

Asked at Amazon

Tree Breadth-First Search Sorting Binary Tree

#163

Rank

#3764MediumFrequency: 29.1%

Maximum Sum With at Most K Elements

Asked at Amazon

Array Greedy Sorting Heap (Priority Queue)Matrix

#164

Rank

#3263EasyFrequency: 29.1%

Divide an Array Into Subarrays With Minimum Cost I

Asked at Amazon

Array Sorting Enumeration

#165

Rank

#4242MediumFrequency: 29.1%

Sum of GCD of Formed Pairs

Asked at Amazon

Array Math Two Pointers Sorting Simulation Number Theory

#166

Rank

#350EasyFrequency: 28.9%

Intersection of Two Arrays II

Asked at Google

Array Hash Table Two Pointers Binary Search Sorting

#167

Rank

#1422MediumFrequency: 28.9%

Divide Array in Sets of K Consecutive Numbers

Asked at Google

Array Hash Table Greedy Sorting

#168

Rank

#1482EasyFrequency: 28.9%

How Many Numbers Are Smaller Than the Current Number

Asked at Google

Array Hash Table Sorting Counting Sort

#169

Rank

#3622MediumFrequency: 28.9%

Maximum Frequency of an Element After Performing Operations I

Asked at Google

Array Binary Search Sliding Window Sorting Prefix Sum

#170

Rank

#324MediumFrequency: 28.1%

Wiggle Sort II

Asked at Google

Array Divide and Conquer Greedy Sorting Quickselect

#171

Rank

#780MediumFrequency: 28.1%

Max Chunks To Make Sorted

Asked at Google

Array Stack Greedy Sorting Monotonic Stack

#172

Rank

#2891MediumFrequency: 28.1%

Maximum Beauty of an Array After Applying Operation

Asked at Google

Array Binary Search Sliding Window Sorting

#173

Rank

#406MediumFrequency: 28.1%

Queue Reconstruction by Height

Asked at Google

Array Binary Indexed Tree Segment Tree Sorting

#174

Rank

#539MediumFrequency: 28.1%

Minimum Time Difference

Asked at Google

Array Math String Sorting

#175

Rank

#3647MediumFrequency: 28.1%

Zero Array Transformation III

Asked at Google

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

#176

Rank

#475MediumFrequency: 27.8%

Heaters

Asked at Amazon

Array Two Pointers Binary Search Sorting

#177

Rank

#646MediumFrequency: 27.8%

Maximum Length of Pair Chain

Asked at Amazon

Array Dynamic Programming Greedy Sorting Longest Increasing Subsequence

#178

Rank

#1222MediumFrequency: 27.8%

Remove Covered Intervals

Asked at Amazon

#179

Rank

#1571HardFrequency: 27.8%

Allocate Mailboxes

Asked at Amazon

Array Math Dynamic Programming Sorting

#180

Rank

#2387MediumFrequency: 27.8%

Partition Array Such That Maximum Difference Is K

Asked at Amazon

Array Greedy Sorting

#181

Rank

#2833MediumFrequency: 27.8%

Count Zero Request Servers

Asked at Amazon

Array Hash Table Sliding Window Sorting

#182

Rank

#3819MediumFrequency: 27.8%

Count Covered Buildings

Asked at Amazon

Array Hash Table Sorting

#183

Rank

#1176MediumFrequency: 27.8%

Design A Leaderboard

Hash Table Design Sorting

#184

Rank

#3675HardFrequency: 27.8%

Maximize Sum of Weights after Edge Removals

Dynamic Programming Tree Depth-First Search Sorting

#185

Rank

#1604MediumFrequency: 27.7%

Least Number of Unique Integers after K Removals

Asked at Salesforce

Array Hash Table Greedy Sorting Counting

#186

Rank

#779HardFrequency: 27.7%

Max Chunks To Make Sorted II

Asked at Salesforce

Array Stack Greedy Sorting Monotonic Stack

#187

Rank

#2485MediumFrequency: 27.7%

Finding the Number of Visible Mountains

Asked at Salesforce

Array Stack Sorting Monotonic Stack

#188

Rank

#630HardFrequency: 27.7%

Course Schedule III

Asked at Salesforce

Array Greedy Sorting Heap (Priority Queue)

#189

Rank

#2142MediumFrequency: 27.3%

Average Height of Buildings in Each Segment

Asked at Microsoft

Array Sorting Heap (Priority Queue)Prefix Sum

#190

Rank

#2242MediumFrequency: 27.3%

Subsequence of Size K With the Largest Even Sum

Asked at Microsoft

Array Greedy Sorting

#191

Rank

#2524EasyFrequency: 27.3%

Largest Positive Integer That Exists With Its Negative

Asked at Microsoft

Array Hash Table Two Pointers Sorting

#192

Rank

#2693MediumFrequency: 27.3%

Maximum Price to Fill a Bag

Asked at Microsoft

Array Greedy Sorting

#193

Rank

#3315HardFrequency: 27.3%

Maximum Number of Intersections on the Chart

Asked at Microsoft

Array Hash Table Math Binary Indexed Tree Geometry Sweep Line Sorting

#194

Rank

#3390MediumFrequency: 27.3%

Minimum Rectangles to Cover Points

Asked at Microsoft

Array Greedy Sorting

#195

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#1616MediumFrequency: 27.2%

Minimum Difference Between Largest and Smallest Value in Three Moves

Asked at Google

Array Greedy Sorting

#196

Rank

#3657MediumFrequency: 27.2%

Check if Grid can be Cut into Sections

Asked at Google

#197

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#594EasyFrequency: 27.2%

Longest Harmonious Subsequence

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Array Hash Table Sliding Window Sorting Counting

#198

Rank

#958EasyFrequency: 26.5%

Sort Array By Parity II

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Array Two Pointers Sorting

#199

Rank

#1798MediumFrequency: 26.5%

Max Number of K-Sum Pairs

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Array Hash Table Two Pointers Sorting

#200

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#1956MediumFrequency: 26.5%

Maximum Element After Decreasing and Rearranging

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Array Greedy Sorting

#201

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#2125HardFrequency: 26.5%

GCD Sort of an Array

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

#202

Rank

#2462HardFrequency: 26.5%

Find the K-Sum of an Array

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Array Sorting Heap (Priority Queue)

#203

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#3276MediumFrequency: 26.5%

Minimum Number of Pushes to Type Word II

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Hash Table String Greedy Sorting Counting

#204

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#3959MediumFrequency: 26.5%

Maximum Total from Optimal Activation Order

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Array Two Pointers Greedy Sorting Heap (Priority Queue)

#205

Rank

#4294HardFrequency: 26.5%

Maximize Fixed Points After Deletions

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Array Binary Search Sorting

#206

Rank

#985MediumFrequency: 26.3%

Bag of Tokens

Asked at Google

Array Two Pointers Greedy Sorting

#207

Rank

#2353HardFrequency: 26.3%

Maximum Score of a Node Sequence

Asked at Google

Array Graph Theory Sorting Enumeration

#208

Rank

#3241MediumFrequency: 26.3%

Divide Array Into Arrays With Max Difference

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Array Greedy Sorting

#209

Rank

#3620MediumFrequency: 26.3%

Maximum Number of Distinct Elements After Operations

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Array Greedy Sorting

#210

Rank

#748EasyFrequency: 25.4%

Largest Number At Least Twice of Others

Asked at Google

#211

Rank

#1483MediumFrequency: 25.4%

Rank Teams by Votes

Asked at Google

Array Hash Table String Sorting Counting

#212

Rank

#506EasyFrequency: 25.4%

Relative Ranks

Asked at Google

Array Sorting Heap (Priority Queue)

#213

Rank

#1741EasyFrequency: 25.3%

Sort Array by Increasing Frequency

Asked at Oracle

Array Hash Table Sorting

#214

Rank

#2664MediumFrequency: 25.3%

Maximize Greatness of an Array

Asked at Oracle

Array Two Pointers Greedy Sorting

#215

Rank

#1052MediumFrequency: 25.3%

Campus Bikes

Asked at Oracle

Array Sorting Heap (Priority Queue)

#216

Rank

#711HardFrequency: 25.1%

Number of Distinct Islands II

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

#217

Rank

#935HardFrequency: 25.1%

Orderly Queue

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Math String Sorting Lexicographically Minimal String Rotation

#218

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#1436MediumFrequency: 25.1%

Get Watched Videos by Your Friends

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Array Hash Table Breadth-First Search Graph Theory Sorting

#219

Rank

#1961MediumFrequency: 25.1%

Maximum Ice Cream Bars

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Array Greedy Sorting Counting Sort

#220

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#2264EasyFrequency: 25.1%

Minimum Sum of Four Digit Number After Splitting Digits

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Math Greedy Sorting

#221

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#3351MediumFrequency: 25.1%

Maximize Happiness of Selected Children

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Array Greedy Sorting

#222

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#3894MediumFrequency: 25.1%

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

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Array Hash Table Greedy Sorting Heap (Priority Queue)

#223

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#4154HardFrequency: 25.1%

Maximum Bitwise AND After Increment Operations

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Array Greedy Bit Manipulation Sorting

#224

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#2917EasyFrequency: 25.1%

Count Pairs Whose Sum is Less than Target

Array Two Pointers Binary Search Sorting

#225

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#3871EasyFrequency: 25.1%

Minimum Deletions for At Most K Distinct Characters

Hash Table String Greedy Sorting Counting

#226

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#358HardFrequency: 24.6%

Rearrange String k Distance Apart

Asked at TikTok

Hash Table String Greedy Sorting Heap (Priority Queue)Counting

#227

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#3107HardFrequency: 24.6%

Maximum Spending After Buying Items

Asked at TikTok

Array Greedy Sorting Heap (Priority Queue)Matrix

#228

Rank

#280MediumFrequency: 24.6%

Wiggle Sort

Asked at TikTok

Array Greedy Sorting

#229

Rank

#1845MediumFrequency: 24.4%

Largest Submatrix With Rearrangements

Asked at Google

Array Greedy Sorting Matrix

#230

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#2055MediumFrequency: 24.4%

Describe the Painting

Asked at Google

Array Hash Table Sorting Prefix Sum

#231

Rank

#2210EasyFrequency: 24.4%

Find Target Indices After Sorting Array

Asked at Google

Array Binary Search Sorting

#232

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#2213HardFrequency: 24.4%

Find All People With Secret

Asked at Google

Depth-First Search Breadth-First Search Union-Find Graph Theory Sorting

#233

Rank

#3278MediumFrequency: 24.4%

Find the Number of Ways to Place People I

Asked at Google

Array Math Geometry Sorting Enumeration

#234

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#3640HardFrequency: 24.4%

Maximum Frequency of an Element After Performing Operations II

Asked at Google

Array Binary Search Sliding Window Sorting Prefix Sum

#235

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#1574EasyFrequency: 24.4%

Maximum Product of Two Elements in an Array

Asked at Google

Array Sorting Heap (Priority Queue)

#236

Rank

#1074EasyFrequency: 23.6%

High Five

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Array Hash Table Sorting Heap (Priority Queue)

#237

Rank

#1083EasyFrequency: 23.6%

Two Sum Less Than K

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Array Two Pointers Binary Search Sorting

#238

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#1140MediumFrequency: 23.6%

Distant Barcodes

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Array Hash Table Greedy Sorting Heap (Priority Queue)Counting

#239

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#1427MediumFrequency: 23.6%

All Elements in Two Binary Search Trees

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Tree Depth-First Search Binary Search Tree Sorting Binary Tree

#240

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#1463EasyFrequency: 23.6%

The K Weakest Rows in a Matrix

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Array Binary Search Sorting Heap (Priority Queue)Matrix

#241

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#2355MediumFrequency: 23.6%

Maximum Consecutive Floors Without Special Floors

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#242

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#2497MediumFrequency: 23.6%

Maximum Matching of Players With Trainers

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Array Two Pointers Greedy Sorting

#243

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#2650EasyFrequency: 23.6%

Split With Minimum Sum

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Math Greedy Sorting

#244

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#2979MediumFrequency: 23.6%

Maximize the Profit as the Salesman

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Array Hash Table Binary Search Dynamic Programming Sorting

#245

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#2164MediumFrequency: 23.6%

Two Best Non-Overlapping Events

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Array Binary Search Dynamic Programming Sorting Heap (Priority Queue)

#246

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#4079MediumFrequency: 23.6%

Maximum Capacity Within Budget

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Array Two Pointers Binary Search Sorting

#247

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#1488MediumFrequency: 23.3%

Sort Integers by The Power Value

Asked at Google

Dynamic Programming Memoization Sorting

#248

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#876MediumFrequency: 23.3%

Hand of Straights

Asked at Google

Array Hash Table Greedy Sorting

#249

Rank

#4107EasyFrequency: 23.3%

Find Missing Elements

Asked at Google

Array Hash Table Sorting

#250

Rank

#164MediumFrequency: 22.5%

Maximum Gap

Asked at Microsoft

Array Sorting Bucket Sort Radix Sort Pigeonhole Principle

#251

Rank

#1784HardFrequency: 22.5%

Minimum Initial Energy to Finish Tasks

Asked at Microsoft

Array Greedy Sorting

#252

Rank

#524MediumFrequency: 22.1%

Longest Word in Dictionary through Deleting

Asked at Google

Array Two Pointers String Sorting

#253

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#1257HardFrequency: 22.1%

Rank Transform of a Matrix

Asked at Google

Array Union-Find Graph Theory Topological Sort Sorting Matrix

#254

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#1730EasyFrequency: 22.1%

Special Array With X Elements Greater Than or Equal X

Asked at Google

Array Binary Search Sorting

#255

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#1752MediumFrequency: 22.1%

Arithmetic Subarrays

Asked at Google

Array Hash Table Sorting

#256

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#1815HardFrequency: 22.1%

Checking Existence of Edge Length Limited Paths

Asked at Google

Array Two Pointers Union-Find Graph Theory Sorting

#257

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#2505HardFrequency: 22.1%

Number of Good Paths

Asked at Google

Array Hash Table Tree Union-Find Graph Theory Sorting

#258

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#2215EasyFrequency: 22.1%

Finding 3-Digit Even Numbers

Asked at Google

Array Hash Table Recursion Sorting Enumeration

#259

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#1777MediumFrequency: 22%

Determine if Two Strings Are Close

Hash Table String Sorting Counting

#260

Rank

#1644HardFrequency: 21.9%

Maximum Number of Non-Overlapping Substrings

Asked at Amazon

Hash Table String Greedy Sorting

#261

Rank

#1957HardFrequency: 21.9%

Closest Room

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Array Binary Search Sorting Ordered Set

#262

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#2405MediumFrequency: 21.9%

Minimum Number of Keypresses

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Hash Table String Greedy Sorting Counting

#263

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#2458MediumFrequency: 21.9%

Find Minimum Time to Finish All Jobs II

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Array Greedy Sorting

#264

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#2561EasyFrequency: 21.9%

Number of Distinct Averages

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Array Hash Table Two Pointers Sorting

#265

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#2590MediumFrequency: 21.9%

Maximum Star Sum of a Graph

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Array Greedy Graph Theory Sorting Heap (Priority Queue)

#266

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#3218HardFrequency: 21.9%

Find Number of Coins to Place in Tree Nodes

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Dynamic Programming Tree Depth-First Search Sorting Heap (Priority Queue)DP on Trees

#267

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#3354MediumFrequency: 21.9%

Replace Question Marks in String to Minimize Its Value

Asked at Amazon

Hash Table String Greedy Sorting Heap (Priority Queue)Counting

#268

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#3766MediumFrequency: 21.9%

Maximum Median Sum of Subsequences of Size 3

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Array Math Greedy Sorting Game Theory

#269

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#929MediumFrequency: 21.5%

Groups of Special-Equivalent Strings

Array Hash Table String Sorting

#270

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#1113MediumFrequency: 21.5%

Moving Stones Until Consecutive II

Array Math Sliding Window Sorting

#271

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#1556EasyFrequency: 21.5%

Make Two Arrays Equal by Reversing Subarrays

Array Hash Table Sorting

#272

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#2204EasyFrequency: 21.5%

Find Subsequence of Length K With the Largest Sum

Array Hash Table Sorting Heap (Priority Queue)

#273

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#2049MediumFrequency: 20.9%

Eliminate Maximum Number of Monsters

Asked at Google

Array Greedy Sorting

#274

Rank

#2123MediumFrequency: 20.9%

The Number of Weak Characters in the Game

Asked at Google

Array Stack Greedy Sorting Monotonic Stack

#275

Rank

#2245MediumFrequency: 20.9%

Destroying Asteroids

Asked at Google

Array Greedy Sorting

#276

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#3681MediumFrequency: 20.9%

Maximum Area Rectangle With Point Constraints I

Asked at Google

Array Math Binary Indexed Tree Segment Tree Geometry Sorting Enumeration

#277

Rank

#900MediumFrequency: 20.9%

Reordered Power of 2

Asked at Google

Hash Table Math Sorting Counting Enumeration

#278

Rank

#1990MediumFrequency: 20.3%

Get Biggest Three Rhombus Sums in a Grid

Array Math Sorting Heap (Priority Queue)Matrix Prefix Sum

#279

Rank

#2469EasyFrequency: 20.3%

Longest Subsequence With Limited Sum

Array Binary Search Greedy Sorting Prefix Sum

#280

Rank

#719HardFrequency: 20.3%

Find K-th Smallest Pair Distance

Array Two Pointers Binary Search Sorting

#281

Rank

#3219MediumFrequency: 20.3%

Make Lexicographically Smallest Array by Swapping Elements

Array Union-Find Sorting

#282

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#1075EasyFrequency: 20%

Index Pairs of a String

Asked at Amazon

Array String Trie Sorting Aho–Corasick Algorithm

#283

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#1098EasyFrequency: 20%

Largest Unique Number

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Array Hash Table Sorting

#284

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#1277HardFrequency: 20%

Largest Multiple of Three

Asked at Amazon

Array Math Dynamic Programming Greedy Sorting

#285

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#1891HardFrequency: 20%

Count Pairs Of Nodes

Asked at Amazon

Array Hash Table Two Pointers Binary Search Graph Theory Sorting Counting

#286

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#1919MediumFrequency: 20%

Sort Features by Popularity

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Array Hash Table String Sorting

#287

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#2018HardFrequency: 20%

Minimum Space Wasted From Packaging

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Array Binary Search Sorting Prefix Sum

#288

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#2112EasyFrequency: 20%

Minimum Difference Between Highest and Lowest of K Scores

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Array Sliding Window Sorting

#289

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#2305MediumFrequency: 20%

Append K Integers With Minimal Sum

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Array Math Greedy Sorting

#290

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#2392MediumFrequency: 20%

Successful Pairs of Spells and Potions

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Array Two Pointers Binary Search Sorting

#291

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#2499HardFrequency: 20%

Minimum Money Required Before Transactions

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Array Greedy Sorting

#292

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#2586MediumFrequency: 20%

Longest Square Streak in an Array

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Array Hash Table Binary Search Dynamic Programming Sorting

#293

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#2738MediumFrequency: 20%

Count the Number of K-Free Subsets

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Array Math Dynamic Programming Sorting Combinatorics

#294

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#2834MediumFrequency: 20%

Relocate Marbles

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Array Hash Table Sorting Simulation

#295

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#3471EasyFrequency: 20%

Minimum Average of Smallest and Largest Elements

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Array Two Pointers Sorting

#296

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#147MediumFrequency: 20%

Insertion Sort List

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Linked List Sorting

#297

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#4109MediumFrequency: 20%

Maximum Calories Burnt from Jumps

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Array Two Pointers Greedy Sorting

#298

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#4089MediumFrequency: 20%

Maximize Points After Choosing K Tasks

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Array Greedy Sorting Heap (Priority Queue)

#299

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#1232MediumFrequency: 19.5%

Sum of Mutated Array Closest to Target

Asked at Google

Array Binary Search Sorting

#300

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#3057HardFrequency: 19.5%

Count K-Subsequences of a String With Maximum Beauty

Asked at Google

Hash Table Math String Greedy Sorting Combinatorics Fermat's Little Theorem

#301

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#522MediumFrequency: 19.5%

Longest Uncommon Subsequence II

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Array Hash Table Two Pointers String Sorting

#302

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#2720MediumFrequency: 19.5%

Minimize the Maximum Difference of Pairs

Asked at Google

Array Binary Search Dynamic Programming Greedy Sorting

#303

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#987MediumFrequency: 19.5%

Reveal Cards In Increasing Order

Asked at Google

Array Queue Sorting Simulation

#304

Rank

#1458EasyFrequency: 19.5%

Sort Integers by The Number of 1 Bits

Asked at Microsoft

Array Bit Manipulation Sorting Counting

#305

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#527HardFrequency: 18%

Word Abbreviation

Asked at Google

Array String Greedy Trie Sorting

#306

Rank

#887HardFrequency: 18%

Minimum Cost to Hire K Workers

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Array Greedy Sorting Heap (Priority Queue)

#307

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#1188HardFrequency: 18%

Brace Expansion II

Asked at Google

Hash Table String Backtracking Stack Breadth-First Search Sorting

#308

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#1615MediumFrequency: 18%

Range Sum of Sorted Subarray Sums

Asked at Google

Array Two Pointers Binary Search Sorting Prefix Sum

#309

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#1851HardFrequency: 18%

Maximum Number of Events That Can Be Attended II

Asked at Google

Array Binary Search Dynamic Programming Sorting

#310

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#1860MediumFrequency: 18%

Find Kth Largest XOR Coordinate Value

Asked at Google

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

#311

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#2447EasyFrequency: 18%

Merge Similar Items

Asked at Google

Array Hash Table Sorting Ordered Set

#312

Rank

#924EasyFrequency: 18%

Fair Candy Swap

Asked at Google

Array Hash Table Binary Search Sorting

#313

Rank

#3158MediumFrequency: 18%

Maximum Length of Semi-Decreasing Subarrays

Asked at Google

Array Stack Sorting Monotonic Stack

#314

Rank

#4010HardFrequency: 18%

Maximize Alternating Sum Using Swaps

Asked at Google

Array Greedy Union-Find Sorting

#315

Rank

#2179MediumFrequency: 18%

Most Beautiful Item for Each Query

Asked at Amazon

Array Binary Search Sorting

#316

Rank

#1388MediumFrequency: 18%

Greatest Sum Divisible by Three

Asked at Amazon

Array Dynamic Programming Greedy Sorting

#317

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#2180HardFrequency: 18%

Maximum Number of Tasks You Can Assign

Asked at Amazon

Array Two Pointers Binary Search Greedy Queue Sorting Monotonic Queue

#318

Rank

#991MediumFrequency: 16.4%

Array of Doubled Pairs

Asked at Google

Array Hash Table Greedy Sorting

#319

Rank

#1169MediumFrequency: 16.4%

Largest Values From Labels

Asked at Google

Array Hash Table Greedy Sorting Counting

#320

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#1210EasyFrequency: 16.4%

Mean of Array After Removing Some Elements

Asked at Google

#321

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#1273MediumFrequency: 16.4%

Compare Strings by Frequency of the Smallest Character

Asked at Google

Array Hash Table String Binary Search Sorting

#322

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#1581MediumFrequency: 16.4%

The k Strongest Values in an Array

Asked at Google

Array Two Pointers Sorting

#323

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#1703MediumFrequency: 16.4%

Put Boxes Into the Warehouse I

Asked at Google

Array Greedy Sorting

#324

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#1707HardFrequency: 16.4%

Check If String Is Transformable With Substring Sort Operations

Asked at Google

String Greedy Sorting

#325

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#1719MediumFrequency: 16.4%

Put Boxes Into the Warehouse II

Asked at Google

Array Greedy Sorting

#326

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#1865HardFrequency: 16.4%

Checking Existence of Edge Length Limited Paths II

Asked at Google

Depth-First Search Union-Find Graph Theory Design Sorting Heap (Priority Queue)Minimum Spanning Tree

#327

Rank

#2029MediumFrequency: 16.4%

Minimize Product Sum of Two Arrays

Asked at Google

Array Greedy Sorting

#328

Rank

#2241HardFrequency: 16.4%

Recover the Original Array

Asked at Google

Array Hash Table Two Pointers Sorting Enumeration

#329

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#2256MediumFrequency: 16.4%

Count Words Obtained After Adding a Letter

Asked at Google

Array Hash Table String Bit Manipulation Sorting

#330

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#2359MediumFrequency: 16.4%

Maximum White Tiles Covered by a Carpet

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Array Binary Search Greedy Sliding Window Sorting Prefix Sum

#331

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#2367MediumFrequency: 16.4%

Minimum Lines to Represent a Line Chart

Asked at Google

Array Math Geometry Sorting Number Theory

#332

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#2489HardFrequency: 16.4%

Sort Array by Moving Items to Empty Space

Asked at Google

Array Hash Table Sorting

#333

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#2506HardFrequency: 16.4%

Minimize Maximum Value in a Grid

Asked at Google

Array Union-Find Graph Theory Topological Sort Sorting Matrix

#334

Rank

#3229MediumFrequency: 16.4%

Minimum Cost to Make Array Equalindromic

Asked at Google

Array Math Binary Search Greedy Sorting

#335

Rank

#3298HardFrequency: 16.4%

Maximize Consecutive Elements in an Array After Modification

Asked at Google

Array Dynamic Programming Sorting

#336

Rank

#2263HardFrequency: 16.4%

Maximum Running Time of N Computers

Asked at Google

Array Binary Search Greedy Sorting

#337

Rank

#1217EasyFrequency: 16.4%

Relative Sort Array

Asked at Google

Array Hash Table Sorting Counting Sort Quicksort Bubble Sort

#338

Rank

#1018EasyFrequency: 16.4%

Largest Perimeter Triangle

Asked at Google

Array Math Greedy Sorting Quicksort Polygons

#339

Rank

#3970MediumFrequency: 16.4%

Power Update After K-th Largest Insertion I

Asked at Google

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

#340

Rank

#3967MediumFrequency: 16.4%

Earliest Finish Time for Land and Water Rides II

Asked at Google

Array Two Pointers Binary Search Greedy Sorting

#341

Rank

#3724MediumFrequency: 16.4%

Filter Occupied Intervals

Asked at Google

#342

Rank

#462MediumFrequency: 16.1%

Minimum Moves to Equal Array Elements II

Asked at Microsoft

Array Math Sorting

#343

Rank

#2636MediumFrequency: 16.1%

Maximum Subsequence Score

Asked at Microsoft

Array Greedy Sorting Heap (Priority Queue)

#344

Rank

#436MediumFrequency: 16.1%

Find Right Interval

Asked at Microsoft

Array Binary Search Sorting

#345

Rank

#1970EasyFrequency: 16.1%

Sorting the Sentence

Asked at Microsoft

String Sorting Bubble Sort

#346

Rank

#759HardFrequency: 16.1%

Set Intersection Size At Least Two

Asked at Microsoft

Array Greedy Sorting

#347

Rank

#3226EasyFrequency: 16.1%

Minimum Number Game

Asked at Microsoft

Array Sorting Heap (Priority Queue)Simulation

#348

Rank

#1353EasyFrequency: 15.7%

Find Resultant Array After Removing Anagrams

Asked at Amazon

Array Hash Table String Sorting

#349

Rank

#2600MediumFrequency: 15.7%

Maximum Tastiness of Candy Basket

Asked at Amazon

Array Binary Search Greedy Sorting

#350

Rank

#3437MediumFrequency: 15.7%

Maximum Total Damage With Spell Casting

Asked at Amazon

Array Hash Table Two Pointers Binary Search Dynamic Programming Sorting Counting

#351

Rank

#2248EasyFrequency: 15.7%

Minimum Cost of Buying Candies With Discount

Asked at Amazon

Array Greedy Sorting

#352

Rank

#3965EasyFrequency: 15.7%

Earliest Finish Time for Land and Water Rides I

Asked at Amazon

Array Two Pointers Binary Search Greedy Sorting

#353

Rank

#3859EasyFrequency: 14.6%

Maximum Product of Two Digits

Asked at Google

#354

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#3852HardFrequency: 14.6%

Path Existence Queries in a Graph II

Asked at Google

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

#355

Rank

#1988MediumFrequency: 14.6%

Minimize Maximum Pair Sum in Array

Asked at Google

Array Two Pointers Greedy Sorting

#356

Rank

#3812MediumFrequency: 14.6%

Smallest Palindromic Rearrangement I

Asked at Google

String Sorting Counting Sort

#357

Rank

#3307HardFrequency: 14.4%

Find the Maximum Sum of Node Values

Array Dynamic Programming Greedy Bit Manipulation Tree Sorting

#358

Rank

#1367HardFrequency: 13.2%

Maximum Height by Stacking Cuboids

Asked at Amazon

Array Dynamic Programming Sorting

#359

Rank

#3214MediumFrequency: 13.2%

Maximize Area of Square Hole in Grid

Asked at Amazon

#360

Rank

#1466HardFrequency: 12.6%

Jump Game V

Asked at Google

Array Dynamic Programming Sorting

#361

Rank

#2274EasyFrequency: 12.6%

Keep Multiplying Found Values by Two

Asked at Google

Array Hash Table Sorting Simulation

#362

Rank

#3291MediumFrequency: 12%

Find if Array Can Be Sorted

Asked at Microsoft

Array Bit Manipulation Sorting

#363

Rank

#2160MediumFrequency: 12%

Minimum Operations to Make a Uni-Value Grid

Asked at Microsoft

Array Math Sorting Matrix

#364

Rank

#2887MediumFrequency: 12%

Sort Vowels in a String

Asked at Microsoft

#365

Rank

#3721MediumFrequency: 12%

Count Mentions Per User

Asked at Microsoft

Array Math Sorting Simulation

#366

Rank

#1968HardFrequency: 11.4%

Maximum Building Height

Array Math Sorting

#367

Rank

#1733HardFrequency: 10.5%

Maximum Number of Visible Points

Asked at Google

Array Math Geometry Sliding Window Sorting

#368

Rank

#2488MediumFrequency: 10.5%

Divide Intervals Into Minimum Number of Groups

Asked at Google

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

#369

Rank

#3001HardFrequency: 10.5%

Apply Operations to Maximize Score

Asked at Google

Array Math Stack Greedy Sorting Monotonic Stack Number Theory

#370

Rank

#3748MediumFrequency: 10.5%

Sort Matrix by Diagonals

Asked at Google

Array Sorting Matrix

#371

Rank

#1354MediumFrequency: 10.5%

Find Players With Zero or One Losses

Asked at Google

Array Hash Table Sorting Counting

#372

Rank

#2892EasyFrequency: 10.5%

Check if Array is Good

Asked at Google

Array Hash Table Sorting

#373

Rank

#946MediumFrequency: 10.3%

Smallest Range II

Asked at Amazon

Array Math Greedy Sorting

#374

Rank

#2718MediumFrequency: 10.3%

Minimum Operations to Make All Array Elements Equal

Asked at Amazon

Array Binary Search Sorting Prefix Sum

#375

Rank

#1519EasyFrequency: 10.3%

Minimum Subsequence in Non-Increasing Order

Asked at Amazon

Array Greedy Sorting

#376

Rank

#2695MediumFrequency: 10.3%

Find Score of an Array After Marking All Elements

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Array Hash Table Sorting Heap (Priority Queue)Simulation

#377

Rank

#2655MediumFrequency: 10.3%

Rearrange Array to Maximize Prefix Score

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Array Greedy Sorting Prefix Sum

#378

Rank

#1009MediumFrequency: 10.3%

Pancake Sorting

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Array Two Pointers Greedy Sorting

#379

Rank

#2079HardFrequency: 8.1%

Delete Duplicate Folders in System

Asked at Google

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

#380

Rank

#1470MediumFrequency: 8.1%

Tweet Counts Per Frequency

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Hash Table String Binary Search Design Sorting Ordered Set

#381

Rank

#2888MediumFrequency: 8.1%

Minimum Index of a Valid Split

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Array Hash Table Sorting

#382

Rank

#3847MediumFrequency: 8.1%

Minimum Swaps to Sort by Digit Sum

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Array Hash Table Sorting

#383

Rank

#959MediumFrequency: 8.1%

3Sum With Multiplicity

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Array Hash Table Two Pointers Sorting Counting

#384

Rank

#1881HardFrequency: 8.1%

Closest Subsequence Sum

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

#385

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#3873MediumFrequency: 8.1%

Subsequence Sum After Capping Elements

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Array Two Pointers Dynamic Programming Sorting

#386

Rank

#3884MediumFrequency: 8.1%

Minimum Absolute Difference in Sliding Submatrix

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Array Sorting Matrix

#387

Rank

#3781HardFrequency: 8.1%

Maximize the Distance Between Points on a Square

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Array Math Binary Search Geometry Sorting

#388

Rank

#2284MediumFrequency: 7.3%

Smallest Value of the Rearranged Number

Asked at Microsoft

#389

Rank

#1503HardFrequency: 7.3%

Reducing Dishes

Asked at Microsoft

Array Dynamic Programming Greedy Sorting

#390

Rank

#1561MediumFrequency: 7.3%

Rearrange Words in a Sentence

Asked at Microsoft

#391

Rank

#2283EasyFrequency: 7.3%

Sort Even and Odd Indices Independently

Asked at Microsoft

#392

Rank

#2978MediumFrequency: 7.3%

Check if Strings Can be Made Equal With Operations II

Asked at Microsoft

Hash Table String Sorting

#393

Rank

#1683MediumFrequency: 7.3%

Maximum Number of Coins You Can Get

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Array Math Greedy Sorting Game Theory

#394

Rank

#720MediumFrequency: 7.3%

Longest Word in Dictionary

Asked at Microsoft

Array Hash Table String Trie Sorting

#395

Rank

#1748MediumFrequency: 7.3%

Best Team With No Conflicts

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Array Dynamic Programming Sorting Longest Increasing Subsequence

#396

Rank

#1253MediumFrequency: 7.2%

Sort the Matrix Diagonally

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Array Sorting Matrix

#397

Rank

#2148EasyFrequency: 7.2%

Minimum Number of Moves to Seat Everyone

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Array Greedy Sorting Counting Sort

#398

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#3485MediumFrequency: 7.2%

Maximize Score of Numbers in Ranges

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Array Binary Search Greedy Sorting

#399

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#3714MediumFrequency: 7.2%

Maximum and Minimum Sums of at Most Size K Subsequences

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Array Math Dynamic Programming Sorting Combinatorics

#400

Rank

#3104MediumFrequency: 7.2%

Happy Students

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Array Sorting Enumeration

#401

Rank

#3509MediumFrequency: 5.5%

K-th Largest Perfect Subtree Size in Binary Tree

Asked at Google

Tree Depth-First Search Sorting Binary Tree

#402

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#2585EasyFrequency: 5.5%

Delete Greatest Value in Each Row

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Array Sorting Heap (Priority Queue)Matrix Simulation

#403

Rank

#2269EasyFrequency: 5.5%

Count Elements With Strictly Smaller and Greater Elements

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Array Sorting Counting

#404

Rank

#3689HardFrequency: 5.5%

Maximum Area Rectangle With Point Constraints II

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Array Math Binary Indexed Tree Segment Tree Geometry Sorting

#405

Rank

#3934EasyFrequency: 5.5%

Coupon Code Validator

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Array Hash Table String Sorting

#406

Rank

#3196HardFrequency: 5.5%

Apply Operations to Maximize Frequency Score

Asked at Google

Array Binary Search Sliding Window Sorting Prefix Sum

#407

Rank

#3151MediumFrequency: 5.5%

Minimum Processing Time

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Array Greedy Sorting

#408

Rank

#4277MediumFrequency: 5.5%

Minimum Operations to Transform Array into Alternating Prime

Asked at Google

Array Math Two Pointers Binary Search Sorting Number Theory

#409

Rank

#843MediumFrequency: 5%

Binary Trees With Factors

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Array Hash Table Dynamic Programming Sorting

#410

Rank

#2657HardFrequency: 5%

Minimum Time to Complete All Tasks

Asked at Google

Array Binary Search Stack Greedy Sorting

#411

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#2412EasyFrequency: 5%

Minimum Amount of Time to Fill Cups

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Array Greedy Sorting Heap (Priority Queue)

#412

Rank

#2787MediumFrequency: 5%

Movement of Robots

Asked at Google

Array Brainteaser Sorting Prefix Sum

#413

Rank

#3712MediumFrequency: 5%

Minimum Cost to Make Arrays Identical

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Array Greedy Sorting

#414

Rank

#3360MediumFrequency: 5%

Minimum Deletions to Make String K-Special

Asked at Google

Hash Table String Greedy Sorting Counting

#415

Rank

#2113MediumFrequency: 5%

Find the Kth Largest Integer in the Array

Asked at Google

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

#416

Rank

#2765HardFrequency: 5%

Make Array Empty

Asked at Google

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

#417

Rank

#1575MediumFrequency: 5%

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

Asked at Google

Array Greedy Sorting

#418

Rank

#4101MediumFrequency: 5%

Maximum Product of Three Elements After One Replacement

Asked at Google

Array Math Greedy Sorting

#419

Rank

#2756EasyFrequency: 5%

Buy Two Chocolates

Asked at Google

Array Greedy Sorting

#420

Rank

#3500HardFrequency: 5%

Minimum Cost for Cutting Cake II

Asked at Google

Array Greedy Sorting

#421

Rank

#4150EasyFrequency: 5%

Sort Integers by Binary Reflection

Asked at Google

#422

Rank

#901MediumFrequency: 5%

Advantage Shuffle

Asked at Amazon

Array Two Pointers Greedy Sorting

#423

Rank

#2539HardFrequency: 5%

Minimum Number of Operations to Make Arrays Similar

Asked at Amazon

Array Greedy Sorting

#424

Rank

#3771MediumFrequency: 5%

Select K Disjoint Special Substrings

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Hash Table String Dynamic Programming Greedy Sorting

#425

Rank

#3562HardFrequency: 5%

Maximum Score of Non-overlapping Intervals

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Array Binary Search Dynamic Programming Sorting

#426

Rank

#3531HardFrequency: 5%

Minimum Amount of Damage Dealt to Bob

Asked at Amazon

Array Greedy Sorting

#427

Rank

#2631MediumFrequency: 5%

Sort the Students by Their Kth Score

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Array Sorting Matrix

#428

Rank

#3908MediumFrequency: 5%

Minimum Time for K Connected Components

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Binary Search Union-Find Graph Theory Sorting

#429

Rank

#4160MediumFrequency: 5%

Maximum Sum of Three Numbers Divisible by Three

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Array Greedy Sorting Heap (Priority Queue)

#430

Rank

#2670MediumFrequency: 5%

Make K-Subarray Sums Equal

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Array Math Greedy Sorting Number Theory

#431

Rank

#2815MediumFrequency: 5%

Find Maximal Uncovered Ranges

#432

Rank

#2549HardFrequency: 5%

Next Greater Element IV

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

#433

Rank

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