Array Interview Questions

Rank

#3594MediumFrequency: 100%

Identify the Largest Outlier in an Array

Array Hash Table Counting Enumeration

Rank

#3613MediumFrequency: 100%

Maximize Amount After Two Days of Conversions

Array String Depth-First Search Breadth-First Search Graph

Rank

#49MediumFrequency: 100%

Group Anagrams

Array Hash Table String Sorting

Rank

#1306EasyFrequency: 100%

Minimum Absolute Difference

Rank

#532MediumFrequency: 100%

K-diff Pairs in an Array

Array Hash Table Two Pointers Binary Search Sorting

Rank

#286MediumFrequency: 100%

Walls and Gates

Rank

#1171MediumFrequency: 100%

Shortest Path in Binary Matrix

Asked at Airbnb

Rank

#362MediumFrequency: 100%

Design Hit Counter

Array Binary Search Design Queue Data Stream

Rank

#658MediumFrequency: 96%

Find K Closest Elements

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

#10

Rank

#833HardFrequency: 95%

Bus Routes

Array Hash Table Breadth-First Search

#11

Rank

#348MediumFrequency: 93%

Design Tic-Tac-Toe

Array Hash Table Design Matrix Simulation

#12

Rank

#88EasyFrequency: 92%

Merge Sorted Array

#13

Rank

#215MediumFrequency: 92%

Kth Largest Element in an Array

Array Divide and Conquer Sorting Heap (Priority Queue)Quickselect

#14

Rank

#1046MediumFrequency: 88%

Max Consecutive Ones III

Array Binary Search Sliding Window Prefix Sum

#15

Rank

#200MediumFrequency: 88%

Number of Islands

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

#16

Rank

#300MediumFrequency: 88%

Longest Increasing Subsequence

Array Binary Search Dynamic Programming

#17

Rank

#912MediumFrequency: 87%

Random Pick with Weight

Array Math Binary Search Prefix Sum Randomized

#18

Rank

#238MediumFrequency: 87%

Product of Array Except Self

#19

Rank

#322MediumFrequency: 87%

Coin Change

Array Dynamic Programming Breadth-First Search

#20

Rank

#1478MediumFrequency: 87%

Maximum Number of Events That Can Be Attended

Array Greedy Sorting Heap (Priority Queue)

#21

Rank

#621MediumFrequency: 85%

Task Scheduler

Array Hash Table Greedy Sorting Heap (Priority Queue)Counting

#22

Rank

#162MediumFrequency: 85%

Find Peak Element

#23

Rank

#198MediumFrequency: 84%

House Robber

#24

Rank

#213MediumFrequency: 84%

House Robber II

#25

Rank

#1352HardFrequency: 83%

Maximum Profit in Job Scheduling

Array Binary Search Dynamic Programming Sorting

#26

Rank

#560MediumFrequency: 81%

Subarray Sum Equals K

#27

Rank

#53MediumFrequency: 79%

Maximum Subarray

Array Divide and Conquer Dynamic Programming

#28

Rank

#269HardFrequency: 79%

Alien Dictionary

Array String Depth-First Search Breadth-First Search Graph Topological Sort

#29

Rank

#305HardFrequency: 79%

Number of Islands II

#30

Rank

#347MediumFrequency: 76%

Top K Frequent Elements

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

#31

Rank

#1713MediumFrequency: 76%

Dot Product of Two Sparse Vectors

Array Hash Table Two Pointers Design

#32

Rank

#42HardFrequency: 74%

Trapping Rain Water

Array Two Pointers Dynamic Programming Stack Monotonic Stack

#33

Rank

#3654MediumFrequency: 74%

Minimum Array Sum

#34

Rank

#27EasyFrequency: 73%

Remove Element

#35

Rank

#329HardFrequency: 73%

Longest Increasing Path in a Matrix

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

#36

Rank

#907MediumFrequency: 73%

Koko Eating Bananas

#37

Rank

#1397MediumFrequency: 73%

Search Suggestions System

Array String Binary Search Trie Sorting Heap (Priority Queue)

#38

Rank

#1783MediumFrequency: 73%

Ways to Make a Fair Array

#39

Rank

#56MediumFrequency: 72%

Merge Intervals

#40

Rank

#39MediumFrequency: 72%

Combination Sum

#41

Rank

#139MediumFrequency: 72%

Word Break

Array Hash Table String Dynamic Programming Trie Memoization

#42

Rank

#381HardFrequency: 72%

Insert Delete GetRandom O(1) - Duplicates allowed

#43

Rank

#605EasyFrequency: 72%

Can Place Flowers

#44

Rank

#121EasyFrequency: 69%

Best Time to Buy and Sell Stock

#45

Rank

#1108MediumFrequency: 69%

Analyze User Website Visit Pattern

Array Hash Table Sorting

#46

Rank

#1028MediumFrequency: 69%

Interval List Intersections

#47

Rank

#1014MediumFrequency: 68%

K Closest Points to Origin

Array Math Divide and Conquer Geometry Sorting Heap (Priority Queue)Quickselect

#48

Rank

#4HardFrequency: 67%

Median of Two Sorted Arrays

Array Binary Search Divide and Conquer

#49

Rank

#1085MediumFrequency: 67%

The Earliest Moment When Everyone Become Friends

Array Union Find Sorting

#50

Rank

#3639MediumFrequency: 67%

Zero Array Transformation I

#51

Rank

#3647MediumFrequency: 67%

Zero Array Transformation III

Array Greedy Sorting Heap (Priority Queue)Prefix Sum

#52

Rank

#136EasyFrequency: 66%

Single Number

Array Bit Manipulation

#53

Rank

#283EasyFrequency: 66%

Move Zeroes

#54

Rank

#733EasyFrequency: 66%

Flood Fill

Array Depth-First Search Breadth-First Search Matrix

#55

Rank

#2089MediumFrequency: 66%

Maximum Matrix Sum

Array Greedy Matrix

#56

Rank

#2267HardFrequency: 64%

Minimum Difference in Sums After Removal of Elements

Array Dynamic Programming Heap (Priority Queue)

#57

Rank

#78MediumFrequency: 64%

Subsets

#58

Rank

#1909MediumFrequency: 64%

Buildings With an Ocean View

#59

Rank

#54MediumFrequency: 63%

Spiral Matrix

#60

Rank

#79MediumFrequency: 63%

Word Search

Array String Backtracking Matrix

#61

Rank

#399MediumFrequency: 63%

Evaluate Division

Array String Depth-First Search Breadth-First Search Union Find Graph Shortest Path

#62

Rank

#772MediumFrequency: 63%

Construct Quad Tree

Array Divide and Conquer Tree Matrix

#63

Rank

#1019EasyFrequency: 63%

Squares of a Sorted Array

#64

Rank

#1549MediumFrequency: 63%

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

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

#65

Rank

#34MediumFrequency: 63%

Find First and Last Position of Element in Sorted Array

#66

Rank

#40MediumFrequency: 63%

Combination Sum II

#67

Rank

#152MediumFrequency: 63%

Maximum Product Subarray

#68

Rank

#244MediumFrequency: 63%

Shortest Word Distance II

Array Hash Table Two Pointers String Design

#69

Rank

#31MediumFrequency: 62%

Next Permutation

#70

Rank

#346EasyFrequency: 62%

Moving Average from Data Stream

Array Design Queue Data Stream

#71

Rank

#721MediumFrequency: 62%

Accounts Merge

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

#72

Rank

#253MediumFrequency: 62%

Meeting Rooms II

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

#73

Rank

#2868MediumFrequency: 60%

Continuous Subarrays

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

#74

Rank

#2891MediumFrequency: 60%

Maximum Beauty of an Array After Applying Operation

Array Binary Search Sliding Window Sorting

#75

Rank

#15MediumFrequency: 60%

3Sum

#76

Rank

#55MediumFrequency: 60%

Jump Game

#77

Rank

#854HardFrequency: 60%

Making A Large Island

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

#78

Rank

#1646EasyFrequency: 57%

Kth Missing Positive Number

#79

Rank

#2164MediumFrequency: 56%

Two Best Non-Overlapping Events

Array Binary Search Dynamic Programming Sorting Heap (Priority Queue)

#80

Rank

#18MediumFrequency: 55%

4Sum

#81

Rank

#33MediumFrequency: 55%

Search in Rotated Sorted Array

#82

Rank

#90MediumFrequency: 55%

Subsets II

#83

Rank

#128MediumFrequency: 55%

Longest Consecutive Sequence

#84

Rank

#167MediumFrequency: 55%

Two Sum II - Input Array Is Sorted

Array Two Pointers Binary Search

#85

Rank

#169EasyFrequency: 55%

Majority Element

Array Hash Table Divide and Conquer Sorting Counting

#86

Rank

#1036MediumFrequency: 55%

Rotting Oranges

#87

Rank

#1147MediumFrequency: 55%

Flip Columns For Maximum Number of Equal Rows

#88

Rank

#1468EasyFrequency: 55%

Check If N and Its Double Exist

Array Hash Table Two Pointers Binary Search Sorting

#89

Rank

#2711HardFrequency: 55%

Minimum Time to Visit a Cell In a Grid

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

#90

Rank

#3555EasyFrequency: 55%

Final Array State After K Multiplication Operations I

Array Math Heap (Priority Queue)Simulation

#91

Rank

#26EasyFrequency: 53%

Remove Duplicates from Sorted Array

#92

Rank

#35EasyFrequency: 53%

Search Insert Position

#93

Rank

#380MediumFrequency: 51%

Insert Delete GetRandom O(1)

#94

Rank

#1056MediumFrequency: 51%

Capacity To Ship Packages Within D Days

#95

Rank

#51HardFrequency: 48%

N-Queens

#96

Rank

#118EasyFrequency: 48%

Pascal's Triangle

#97

Rank

#976MediumFrequency: 48%

Minimum Area Rectangle

Array Hash Table Math Geometry Sorting

#98

Rank

#1886MediumFrequency: 48%

Minimum Limit of Balls in a Bag

#99

Rank

#2232MediumFrequency: 48%

Adding Spaces to a String

Array Two Pointers String Simulation

#100

Rank

#2692EasyFrequency: 48%

Take Gifts From the Richest Pile

Array Heap (Priority Queue)Simulation

#101

Rank

#3643MediumFrequency: 48%

Zero Array Transformation II

Array Binary Search Prefix Sum

#102

Rank

#48MediumFrequency: 47%

Rotate Image

Array Math Matrix

#103

Rank

#84HardFrequency: 45%

Largest Rectangle in Histogram

#104

Rank

#122MediumFrequency: 45%

Best Time to Buy and Sell Stock II

#105

Rank

#239HardFrequency: 45%

Sliding Window Maximum

Array Queue Sliding Window Heap (Priority Queue)Monotonic Queue

#106

Rank

#373MediumFrequency: 45%

Find K Pairs with Smallest Sums

Array Heap (Priority Queue)

#107

Rank

#1034HardFrequency: 45%

Subarrays with K Different Integers

Array Hash Table Sliding Window Counting

#108

Rank

#249MediumFrequency: 43%

Group Shifted Strings

Array Hash Table String

#109

Rank

#325MediumFrequency: 43%

Maximum Size Subarray Sum Equals k

#110

Rank

#498MediumFrequency: 43%

Diagonal Traverse

#111

Rank

#523MediumFrequency: 43%

Continuous Subarray Sum

Array Hash Table Math Prefix Sum

#112

Rank

#777EasyFrequency: 43%

Toeplitz Matrix

Array Matrix

#113

Rank

#11MediumFrequency: 42%

Container With Most Water

Array Two Pointers Greedy

#114

Rank

#46MediumFrequency: 42%

Permutations

#115

Rank

#63MediumFrequency: 42%

Unique Paths II

#116

Rank

#66EasyFrequency: 42%

Plus One

Array Math

#117

Rank

#75MediumFrequency: 42%

Sort Colors

#118

Rank

#179MediumFrequency: 42%

Largest Number

Array String Greedy Sorting

#119

Rank

#268EasyFrequency: 42%

Missing Number

Array Hash Table Math Binary Search Bit Manipulation Sorting

#120

Rank

#410HardFrequency: 42%

Split Array Largest Sum

Array Binary Search Dynamic Programming Greedy Prefix Sum

#121

Rank

#518MediumFrequency: 42%

Coin Change II

#122

Rank

#739MediumFrequency: 42%

Daily Temperatures

#123

Rank

#987MediumFrequency: 42%

Reveal Cards In Increasing Order

Array Queue Sorting Simulation

#124

Rank

#1330MediumFrequency: 42%

Longest Arithmetic Subsequence of Given Difference

Array Hash Table Dynamic Programming

#125

Rank

#1966MediumFrequency: 42%

Frequency of the Most Frequent Element

Array Binary Search Greedy Sliding Window Sorting Prefix Sum

#126

Rank

#3681MediumFrequency: 42%

Maximum Area Rectangle With Point Constraints I

Array Math Binary Indexed Tree Segment Tree Geometry Sorting Enumeration

#127

Rank

#163EasyFrequency: 37%

Missing Ranges

Array

#128

Rank

#378MediumFrequency: 37%

Kth Smallest Element in a Sorted Matrix

Array Binary Search Sorting Heap (Priority Queue)Matrix

#129

Rank

#735MediumFrequency: 37%

Asteroid Collision

Array Stack Simulation

#130

Rank

#852MediumFrequency: 37%

Friends Of Appropriate Ages

Array Two Pointers Binary Search Sorting

#131

Rank

#36MediumFrequency: 36%

Valid Sudoku

#132

Rank

#64MediumFrequency: 36%

Minimum Path Sum

#133

Rank

#80MediumFrequency: 36%

Remove Duplicates from Sorted Array II

#134

Rank

#134MediumFrequency: 36%

Gas Station

#135

Rank

#188HardFrequency: 36%

Best Time to Buy and Sell Stock IV

#136

Rank

#41HardFrequency: 33%

First Missing Positive

#137

Rank

#45MediumFrequency: 33%

Jump Game II

Start Free TrialNo credit card required View Pricing

#138

Rank

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Array Interview Questions

Master 138 array problems frequently asked in technical interviews. These questions test your understanding of arrayconcepts and are essential for coding interview success.

138

Total Problems

Easy

Medium

Hard

Two Sum

Rank

#3594MediumFrequency: 100%

Identify the Largest Outlier in an Array

Array Hash Table Counting Enumeration

Rank

#3613MediumFrequency: 100%

Maximize Amount After Two Days of Conversions

Array String Depth-First Search Breadth-First Search Graph

Rank

#49MediumFrequency: 100%

Group Anagrams

Array Hash Table String Sorting

Rank

#1306EasyFrequency: 100%

Minimum Absolute Difference

Rank

#532MediumFrequency: 100%

K-diff Pairs in an Array

Array Hash Table Two Pointers Binary Search Sorting

Rank

#286MediumFrequency: 100%

Walls and Gates

Rank

#1171MediumFrequency: 100%

Shortest Path in Binary Matrix

Asked at Airbnb

Rank

#362MediumFrequency: 100%

Design Hit Counter

Array Binary Search Design Queue Data Stream

Rank

#658MediumFrequency: 96%

Find K Closest Elements

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

#10

Rank

#833HardFrequency: 95%

Bus Routes

Array Hash Table Breadth-First Search

#11

Rank

#348MediumFrequency: 93%

Design Tic-Tac-Toe

Array Hash Table Design Matrix Simulation

#12

Rank

#88EasyFrequency: 92%

Merge Sorted Array

#13

Rank

#215MediumFrequency: 92%

Kth Largest Element in an Array

Array Divide and Conquer Sorting Heap (Priority Queue)Quickselect

#14

Rank

#1046MediumFrequency: 88%

Max Consecutive Ones III

Array Binary Search Sliding Window Prefix Sum

#15

Rank

#200MediumFrequency: 88%

Number of Islands

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

#16

Rank

#300MediumFrequency: 88%

Longest Increasing Subsequence

Array Binary Search Dynamic Programming

#17

Rank

#912MediumFrequency: 87%

Random Pick with Weight

Array Math Binary Search Prefix Sum Randomized

#18

Rank

#238MediumFrequency: 87%

Product of Array Except Self

#19

Rank

#322MediumFrequency: 87%

Coin Change

Array Dynamic Programming Breadth-First Search

#20

Rank

#1478MediumFrequency: 87%

Maximum Number of Events That Can Be Attended

Array Greedy Sorting Heap (Priority Queue)

#21

Rank

#621MediumFrequency: 85%

Task Scheduler

Array Hash Table Greedy Sorting Heap (Priority Queue)Counting

#22

Rank

#162MediumFrequency: 85%

Find Peak Element

#23

Rank

#198MediumFrequency: 84%

House Robber

#24

Rank

#213MediumFrequency: 84%

House Robber II

#25

Rank

#1352HardFrequency: 83%

Maximum Profit in Job Scheduling

Array Binary Search Dynamic Programming Sorting

#26

Rank

#560MediumFrequency: 81%

Subarray Sum Equals K

#27

Rank

#53MediumFrequency: 79%

Maximum Subarray

Array Divide and Conquer Dynamic Programming

#28

Rank

#269HardFrequency: 79%

Alien Dictionary

Array String Depth-First Search Breadth-First Search Graph Topological Sort

#29

Rank

#305HardFrequency: 79%

Number of Islands II

#30

Rank

#347MediumFrequency: 76%

Top K Frequent Elements

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

#31

Rank

#1713MediumFrequency: 76%

Dot Product of Two Sparse Vectors

Array Hash Table Two Pointers Design

#32

Rank

#42HardFrequency: 74%

Trapping Rain Water

Array Two Pointers Dynamic Programming Stack Monotonic Stack

#33

Rank

#3654MediumFrequency: 74%

Minimum Array Sum

#34

Rank

#27EasyFrequency: 73%

Remove Element

#35

Rank

#329HardFrequency: 73%

Longest Increasing Path in a Matrix

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

#36

Rank

#907MediumFrequency: 73%

Koko Eating Bananas

#37

Rank

#1397MediumFrequency: 73%

Search Suggestions System

Array String Binary Search Trie Sorting Heap (Priority Queue)

#38

Rank

#1783MediumFrequency: 73%

Ways to Make a Fair Array

#39

Rank

#56MediumFrequency: 72%

Merge Intervals

#40

Rank

#39MediumFrequency: 72%

Combination Sum

#41

Rank

#139MediumFrequency: 72%

Word Break

Array Hash Table String Dynamic Programming Trie Memoization

#42

Rank

#381HardFrequency: 72%

Insert Delete GetRandom O(1) - Duplicates allowed

#43

Rank

#605EasyFrequency: 72%

Can Place Flowers

#44

Rank

#121EasyFrequency: 69%

Best Time to Buy and Sell Stock

#45

Rank

#1108MediumFrequency: 69%

Analyze User Website Visit Pattern

Array Hash Table Sorting

#46

Rank

#1028MediumFrequency: 69%

Interval List Intersections

#47

Rank

#1014MediumFrequency: 68%

K Closest Points to Origin

Array Math Divide and Conquer Geometry Sorting Heap (Priority Queue)Quickselect

#48

Rank

#4HardFrequency: 67%

Median of Two Sorted Arrays

Array Binary Search Divide and Conquer

#49

Rank

#1085MediumFrequency: 67%

The Earliest Moment When Everyone Become Friends

Array Union Find Sorting

#50

Rank

#3639MediumFrequency: 67%

Zero Array Transformation I

#51

Rank

#3647MediumFrequency: 67%

Zero Array Transformation III

Array Greedy Sorting Heap (Priority Queue)Prefix Sum

#52

Rank

#136EasyFrequency: 66%

Single Number

Array Bit Manipulation

#53

Rank

#283EasyFrequency: 66%

Move Zeroes

#54

Rank

#733EasyFrequency: 66%

Flood Fill

Array Depth-First Search Breadth-First Search Matrix

#55

Rank

#2089MediumFrequency: 66%

Maximum Matrix Sum

Array Greedy Matrix

#56

Rank

#2267HardFrequency: 64%

Minimum Difference in Sums After Removal of Elements

Array Dynamic Programming Heap (Priority Queue)

#57

Rank

#78MediumFrequency: 64%

Subsets

#58

Rank

#1909MediumFrequency: 64%

Buildings With an Ocean View

#59

Rank

#54MediumFrequency: 63%

Spiral Matrix

#60

Rank

#79MediumFrequency: 63%

Word Search

Array String Backtracking Matrix

#61

Rank

#399MediumFrequency: 63%

Evaluate Division

Array String Depth-First Search Breadth-First Search Union Find Graph Shortest Path

#62

Rank

#772MediumFrequency: 63%

Construct Quad Tree

Array Divide and Conquer Tree Matrix

#63

Rank

#1019EasyFrequency: 63%

Squares of a Sorted Array

#64

Rank

#1549MediumFrequency: 63%

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

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

#65

Rank

#34MediumFrequency: 63%

Find First and Last Position of Element in Sorted Array

#66

Rank

#40MediumFrequency: 63%

Combination Sum II

#67

Rank

#152MediumFrequency: 63%

Maximum Product Subarray

#68

Rank

#244MediumFrequency: 63%

Shortest Word Distance II

Array Hash Table Two Pointers String Design

#69

Rank

#31MediumFrequency: 62%

Next Permutation

#70

Rank

#346EasyFrequency: 62%

Moving Average from Data Stream

Array Design Queue Data Stream

#71

Rank

#721MediumFrequency: 62%

Accounts Merge

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

#72

Rank

#253MediumFrequency: 62%

Meeting Rooms II

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

#73

Rank

#2868MediumFrequency: 60%

Continuous Subarrays

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

#74

Rank

#2891MediumFrequency: 60%

Maximum Beauty of an Array After Applying Operation

Array Binary Search Sliding Window Sorting

#75

Rank

#15MediumFrequency: 60%

3Sum

#76

Rank

#55MediumFrequency: 60%

Jump Game

#77

Rank

#854HardFrequency: 60%

Making A Large Island

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

#78

Rank

#1646EasyFrequency: 57%

Kth Missing Positive Number

#79

Rank

#2164MediumFrequency: 56%

Two Best Non-Overlapping Events

Array Binary Search Dynamic Programming Sorting Heap (Priority Queue)

#80

Rank

#18MediumFrequency: 55%

4Sum

#81

Rank

#33MediumFrequency: 55%

Search in Rotated Sorted Array

#82

Rank

#90MediumFrequency: 55%

Subsets II

#83

Rank

#128MediumFrequency: 55%

Longest Consecutive Sequence

#84

Rank

#167MediumFrequency: 55%

Two Sum II - Input Array Is Sorted

Array Two Pointers Binary Search

#85

Rank

#169EasyFrequency: 55%

Majority Element

Array Hash Table Divide and Conquer Sorting Counting

#86

Rank

#1036MediumFrequency: 55%

Rotting Oranges

#87

Rank

#1147MediumFrequency: 55%

Flip Columns For Maximum Number of Equal Rows

#88

Rank

#1468EasyFrequency: 55%

Check If N and Its Double Exist

Array Hash Table Two Pointers Binary Search Sorting

#89

Rank

#2711HardFrequency: 55%

Minimum Time to Visit a Cell In a Grid

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

#90

Rank

#3555EasyFrequency: 55%

Final Array State After K Multiplication Operations I

Array Math Heap (Priority Queue)Simulation

#91

Rank

#26EasyFrequency: 53%

Remove Duplicates from Sorted Array

#92

Rank

#35EasyFrequency: 53%

Search Insert Position

#93

Rank

#380MediumFrequency: 51%

Insert Delete GetRandom O(1)

#94

Rank

#1056MediumFrequency: 51%

Capacity To Ship Packages Within D Days

#95

Rank

#51HardFrequency: 48%

N-Queens

#96

Rank

#118EasyFrequency: 48%

Pascal's Triangle

#97

Rank

#976MediumFrequency: 48%

Minimum Area Rectangle

Array Hash Table Math Geometry Sorting

#98

Rank

#1886MediumFrequency: 48%

Minimum Limit of Balls in a Bag

#99

Rank

#2232MediumFrequency: 48%

Adding Spaces to a String

Array Two Pointers String Simulation

#100

Rank

#2692EasyFrequency: 48%

Take Gifts From the Richest Pile

Array Heap (Priority Queue)Simulation

#101

Rank

#3643MediumFrequency: 48%

Zero Array Transformation II

Array Binary Search Prefix Sum

#102

Rank

#48MediumFrequency: 47%

Rotate Image

Array Math Matrix

#103

Rank

#84HardFrequency: 45%

Largest Rectangle in Histogram

#104

Rank

#122MediumFrequency: 45%

Best Time to Buy and Sell Stock II

#105

Rank

#239HardFrequency: 45%

Sliding Window Maximum

Array Queue Sliding Window Heap (Priority Queue)Monotonic Queue

#106

Rank

#373MediumFrequency: 45%

Find K Pairs with Smallest Sums

Array Heap (Priority Queue)

#107

Rank

#1034HardFrequency: 45%

Subarrays with K Different Integers

Array Hash Table Sliding Window Counting

#108

Rank

#249MediumFrequency: 43%

Group Shifted Strings

Array Hash Table String

#109

Rank

#325MediumFrequency: 43%

Maximum Size Subarray Sum Equals k

#110

Rank

#498MediumFrequency: 43%

Diagonal Traverse

#111

Rank

#523MediumFrequency: 43%

Continuous Subarray Sum

Array Hash Table Math Prefix Sum

#112

Rank

#777EasyFrequency: 43%

Toeplitz Matrix

Array Matrix

#113

Rank

#11MediumFrequency: 42%

Container With Most Water

Array Two Pointers Greedy

#114

Rank

#46MediumFrequency: 42%

Permutations

#115

Rank

#63MediumFrequency: 42%

Unique Paths II

#116

Rank

#66EasyFrequency: 42%

Plus One

Array Math

#117

Rank

#75MediumFrequency: 42%

Sort Colors

#118

Rank

#179MediumFrequency: 42%

Largest Number

Array String Greedy Sorting

#119

Rank

#268EasyFrequency: 42%

Missing Number

Array Hash Table Math Binary Search Bit Manipulation Sorting

#120

Rank

#410HardFrequency: 42%

Split Array Largest Sum

Array Binary Search Dynamic Programming Greedy Prefix Sum

#121

Rank

#518MediumFrequency: 42%

Coin Change II

#122

Rank

#739MediumFrequency: 42%

Daily Temperatures

#123

Rank

#987MediumFrequency: 42%

Reveal Cards In Increasing Order

Array Queue Sorting Simulation

#124

Rank

#1330MediumFrequency: 42%

Longest Arithmetic Subsequence of Given Difference

Array Hash Table Dynamic Programming

#125

Rank

#1966MediumFrequency: 42%

Frequency of the Most Frequent Element

Array Binary Search Greedy Sliding Window Sorting Prefix Sum

#126

Rank

#3681MediumFrequency: 42%

Maximum Area Rectangle With Point Constraints I

Array Math Binary Indexed Tree Segment Tree Geometry Sorting Enumeration

#127

Rank

#163EasyFrequency: 37%

Missing Ranges

Array

#128

Rank

#378MediumFrequency: 37%

Kth Smallest Element in a Sorted Matrix

Array Binary Search Sorting Heap (Priority Queue)Matrix

#129

Rank

#735MediumFrequency: 37%

Asteroid Collision

Array Stack Simulation

#130

Rank

#852MediumFrequency: 37%

Friends Of Appropriate Ages

Array Two Pointers Binary Search Sorting

#131

Rank

#36MediumFrequency: 36%

Valid Sudoku

#132

Rank

#64MediumFrequency: 36%

Minimum Path Sum

#133

Rank

#80MediumFrequency: 36%

Remove Duplicates from Sorted Array II

#134

Rank

#134MediumFrequency: 36%

Gas Station

#135

Rank

#188HardFrequency: 36%

Best Time to Buy and Sell Stock IV

#136

Rank

#41HardFrequency: 33%

First Missing Positive

#137

Rank

#45MediumFrequency: 33%

Jump Game II