Sliding Window Interview Questions

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

Rank

#3MediumFrequency: 92.8%

Longest Substring Without Repeating Characters

Rank

#438MediumFrequency: 84.4%

Find All Anagrams in a String

Asked at Databricks

Rank

#1046MediumFrequency: 83.2%

Max Consecutive Ones III

Rank

#2667HardFrequency: 76%

Maximum Frequency Score of a Subarray

Array Hash Table Math Stack Sliding Window

Rank

#76HardFrequency: 74.7%

Minimum Window Substring

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

Rank

#239HardFrequency: 74.4%

Sliding Window Maximum

Asked at Oracle

Rank

#1107MediumFrequency: 71.1%

Minimum Swaps to Group All 1's Together

Rank

#219EasyFrequency: 70.1%

Contains Duplicate II

#10

Rank

#713MediumFrequency: 66.4%

Subarray Product Less Than K

#11

Rank

#1423MediumFrequency: 66.4%

Maximum Number of Occurrences of a Substring

#12

Rank

#220HardFrequency: 65.5%

Contains Duplicate III

Array Sliding Window Sorting Bucket Sort Ordered Set

#13

Rank

#658MediumFrequency: 64.6%

Find K Closest Elements

Asked at DoorDash

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

#14

Rank

#940MediumFrequency: 63.6%

Fruit Into Baskets

#15

Rank

#424MediumFrequency: 59.8%

Longest Repeating Character Replacement

#16

Rank

#480HardFrequency: 57.6%

Sliding Window Median

Array Hash Table Sliding Window Heap (Priority Queue)Treap

#17

Rank

#187MediumFrequency: 57.5%

Repeated DNA Sequences

Hash Table String Bit Manipulation Sliding Window Rolling Hash Hash Function Z Algorithm Boyer–Moore String-Search Algorithm

#18

Rank

#3441MediumFrequency: 55.1%

Equalize Strings by Adding or Removing Characters at Ends

String Binary Search Dynamic Programming Sliding Window Hash Function

#19

Rank

#3958MediumFrequency: 55.1%

Minimum Removals to Balance Array

#20

Rank

#2856MediumFrequency: 54.4%

Count Complete Subarrays in an Array

#21

Rank

#3327HardFrequency: 54.4%

Minimum Moves to Pick K Ones

#22

Rank

#2119HardFrequency: 54.1%

Minimum Number of Operations to Make Array Continuous

#23

Rank

#632HardFrequency: 52.9%

Smallest Range Covering Elements from K Lists

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

#24

Rank

#567MediumFrequency: 52.8%

Permutation in String

Hash Table Two Pointers String Sliding Window

#25

Rank

#1966MediumFrequency: 51.8%

Frequency of the Most Frequent Element

Array Binary Search Greedy Sliding Window Sorting Prefix Sum

#26

Rank

#209MediumFrequency: 51.4%

Minimum Size Subarray Sum

#27

Rank

#395MediumFrequency: 51.4%

Longest Substring with At Least K Repeating Characters

Hash Table String Divide and Conquer Sliding Window

#28

Rank

#2527HardFrequency: 49.9%

Count Subarrays With Fixed Bounds

Array Queue Sliding Window Monotonic Queue

#29

Rank

#340MediumFrequency: 48%

Longest Substring with At Most K Distinct Characters

#30

Rank

#643EasyFrequency: 47.5%

Maximum Average Subarray I

#31

Rank

#2673MediumFrequency: 47.5%

Maximize Win From Two Segments

#32

Rank

#3333MediumFrequency: 47.5%

Find Pattern in Infinite Stream I

Array Sliding Window Rolling Hash String Matching Interactive Hash Function

#33

Rank

#3352HardFrequency: 47.5%

Find Pattern in Infinite Stream II

Array Sliding Window Rolling Hash String Matching Interactive Hash Function

#34

Rank

#3475MediumFrequency: 47.5%

Minimum Operations to Make Binary Array Elements Equal to One I

Array Bit Manipulation Queue Sliding Window Prefix Sum

#35

Rank

#3980MediumFrequency: 47.5%

Best Time to Buy and Sell Stock using Strategy

#36

Rank

#3715MediumFrequency: 47.3%

Maximum Coins From K Consecutive Bags

Array Binary Search Greedy Sliding Window Sorting Prefix Sum

#37

Rank

#1034HardFrequency: 46%

Subarrays with K Different Integers

#38

Rank

#1445MediumFrequency: 44.7%

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

#39

Rank

#1370MediumFrequency: 44%

Count Number of Nice Subarrays

Array Hash Table Math Sliding Window Prefix Sum

#40

Rank

#1967MediumFrequency: 40.9%

Longest Substring Of All Vowels in Order

#41

Rank

#159MediumFrequency: 39.1%

Longest Substring with At Most Two Distinct Characters

#42

Rank

#1567MediumFrequency: 38.9%

Maximum Number of Vowels in a Substring of Given Length

#43

Rank

#30HardFrequency: 38.2%

Substring with Concatenation of All Words

#44

Rank

#2552MediumFrequency: 38.2%

Maximum Sum of Distinct Subarrays With Length K

#45

Rank

#727HardFrequency: 36.9%

Minimum Window Subsequence

#46

Rank

#689HardFrequency: 36.8%

Maximum Sum of 3 Non-Overlapping Subarrays

Array Dynamic Programming Sliding Window Prefix Sum

#47

Rank

#966MediumFrequency: 36.3%

Binary Subarrays With Sum

Array Hash Table Sliding Window Prefix Sum

#48

Rank

#1873EasyFrequency: 34.3%

Longest Nice Substring

Hash Table String Divide and Conquer Bit Manipulation Sliding Window

#49

Rank

#3267MediumFrequency: 33.1%

Find Longest Special Substring That Occurs Thrice I

Hash Table String Binary Search Sliding Window Counting

#50

Rank

#3610EasyFrequency: 33.1%

Find X-Sum of All K-Long Subarrays I

Array Hash Table Sliding Window Heap (Priority Queue)

#51

Rank

#1122HardFrequency: 33%

Longest Duplicate Substring

String Binary Search Sliding Window Rolling Hash Suffix Array Hash Function Suffix Automaton Suffix Tree Z Algorithm Boyer–Moore String-Search Algorithm

#52

Rank

#1460MediumFrequency: 32.8%

Number of Substrings Containing All Three Characters

#53

Rank

#2868MediumFrequency: 31.8%

Continuous Subarrays

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

#54

Rank

#2751MediumFrequency: 31.3%

Sliding Subarray Beauty

#55

Rank

#1805HardFrequency: 31.1%

Minimum Adjacent Swaps for K Consecutive Ones

#56

Rank

#867MediumFrequency: 29.7%

New 21 Game

Math Dynamic Programming Sliding Window Probability and Statistics

#57

Rank

#2247MediumFrequency: 29.3%

Number of Unique Flavors After Sharing K Candies

#58

Rank

#892HardFrequency: 29.1%

Shortest Subarray with Sum at Least K

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

#59

Rank

#3622MediumFrequency: 28.9%

Maximum Frequency of an Element After Performing Operations I

Array Binary Search Sliding Window Sorting Prefix Sum

#60

Rank

#2891MediumFrequency: 28.1%

Maximum Beauty of an Array After Applying Operation

#61

Rank

#1813MediumFrequency: 27.8%

Maximum Erasure Value

#62

Rank

#2833MediumFrequency: 27.8%

Count Zero Request Servers

Array Hash Table Sliding Window Sorting

#63

Rank

#3362HardFrequency: 27.3%

Find the Median of the Uniqueness Array

#64

Rank

#1586MediumFrequency: 27.3%

Longest Subarray of 1's After Deleting One Element

#65

Rank

#1776MediumFrequency: 27.2%

Minimum Operations to Reduce X to Zero

Array Hash Table Binary Search Sliding Window Prefix Sum

#66

Rank

#3743MediumFrequency: 27.2%

Reschedule Meetings for Maximum Free Time I

Array Greedy Sliding Window

#67

Rank

#594EasyFrequency: 27.2%

Longest Harmonious Subsequence

Array Hash Table Sliding Window Sorting Counting

#68

Rank

#2449HardFrequency: 26.5%

Maximum Number of Robots Within Budget

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

#69

Rank

#2017MediumFrequency: 25.4%

Minimum Number of Flips to Make the Binary String Alternating

#70

Rank

#2233MediumFrequency: 25.1%

Number of Smooth Descent Periods of a Stock

Array Math Two Pointers Dynamic Programming Sliding Window

#71

Rank

#2255MediumFrequency: 24.6%

Minimum Swaps to Group All 1's Together II

#72

Rank

#413MediumFrequency: 24.6%

Arithmetic Slices

#73

Rank

#2626MediumFrequency: 24.6%

Count the Number of Good Subarrays

#74

Rank

#3225MediumFrequency: 24.6%

Length of Longest Subarray With at Most K Frequency

#75

Rank

#3640HardFrequency: 24.4%

Maximum Frequency of an Element After Performing Operations II

Array Binary Search Sliding Window Sorting Prefix Sum

#76

Rank

#3674HardFrequency: 24.4%

Count Non-Decreasing Subarrays After K Operations

Array Stack Segment Tree Queue Sliding Window Monotonic Stack Monotonic Queue

#77

Rank

#2498MediumFrequency: 23.6%

Smallest Subarrays With Maximum Bitwise OR

Array Binary Search Bit Manipulation Sliding Window

#78

Rank

#2884HardFrequency: 23.6%

Length of the Longest Valid Substring

Array Hash Table String Sliding Window

#79

Rank

#2478MediumFrequency: 22.5%

Longest Nice Subarray

#80

Rank

#2001MediumFrequency: 22.1%

Jump Game VII

String Dynamic Programming Sliding Window Prefix Sum

#81

Rank

#1138MediumFrequency: 21.9%

Grumpy Bookstore Owner

#82

Rank

#1755EasyFrequency: 21.9%

Defuse the Bomb

#83

Rank

#1113MediumFrequency: 21.5%

Moving Stones Until Consecutive II

Array Math Sliding Window Sorting

#84

Rank

#2394HardFrequency: 20.9%

Count Subarrays With Score Less Than K

#85

Rank

#3483MediumFrequency: 20.9%

Alternating Groups II

#86

Rank

#1084MediumFrequency: 20%

Find K-Length Substrings With No Repeated Characters

#87

Rank

#1280EasyFrequency: 20%

Diet Plan Performance

#88

Rank

#2003MediumFrequency: 20%

Distinct Numbers in Each Subarray

#89

Rank

#2112EasyFrequency: 20%

Minimum Difference Between Highest and Lowest of K Scores

Array Sliding Window Sorting

#90

Rank

#2954MediumFrequency: 20%

Maximum Sum of Almost Unique Subarray

#91

Rank

#487MediumFrequency: 19.5%

Max Consecutive Ones II

#92

Rank

#1065MediumFrequency: 19.5%

Binary String With Substrings Representing 1 To N

Hash Table String Bit Manipulation Sliding Window

#93

Rank

#1622HardFrequency: 19.5%

Max Value of Equation

Array Queue Sliding Window Heap (Priority Queue)Monotonic Queue

#94

Rank

#3761HardFrequency: 19.5%

Maximum Difference Between Even and Odd Frequency II

String Sliding Window Enumeration Prefix Sum

#95

Rank

#2211MediumFrequency: 19.4%

K Radius Subarray Averages

#96

Rank

#683HardFrequency: 18%

K Empty Slots

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

#97

Rank

#1573MediumFrequency: 18%

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

Array Hash Table Binary Search Dynamic Programming Sliding Window

#98

Rank

#2069MediumFrequency: 18%

Kth Smallest Subarray Sum

#99

Rank

#3266MediumFrequency: 18%

Find Longest Special Substring That Occurs Thrice II

Hash Table String Binary Search Sliding Window Counting

#100

Rank

#2338MediumFrequency: 18%

Minimum Consecutive Cards to Pick Up

#101

Rank

#718MediumFrequency: 18%

Maximum Length of Repeated Subarray

Array Binary Search Dynamic Programming Sliding Window Rolling Hash Hash Function

#102

Rank

#3349EasyFrequency: 17%

Maximum Length Substring With Two Occurrences

#103

Rank

#2359MediumFrequency: 16.4%

Maximum White Tiles Covered by a Carpet

Array Binary Search Greedy Sliding Window Sorting Prefix Sum

#104

Rank

#1037HardFrequency: 16.4%

Minimum Number of K Consecutive Bit Flips

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

#105

Rank

#2463EasyFrequency: 14.6%

Minimum Recolors to Get K Consecutive Black Blocks

#106

Rank

#2599MediumFrequency: 13.2%

Take K of Each Character From Left and Right

#107

Rank

#1096MediumFrequency: 13.2%

Maximum Sum of Two Non-Overlapping Subarrays

#108

Rank

#2229HardFrequency: 12.6%

Maximum Fruits Harvested After at Most K Steps

#109

Rank

#1987EasyFrequency: 12%

Substrings of Size Three with Distinct Characters

Hash Table String Sliding Window Counting

#110

Rank

#1321MediumFrequency: 12%

Get Equal Substrings Within Budget

#111

Rank

#3380MediumFrequency: 11.4%

Shortest Subarray With OR at Least K II

#112

Rank

#3835MediumFrequency: 11.4%

Count Partitions With Max-Min Difference at Most K

Array Dynamic Programming Queue Sliding Window Prefix Sum Monotonic Queue

#113

Rank

#1733HardFrequency: 10.5%

Maximum Number of Visible Points

Array Math Geometry Sliding Window Sorting

#114

Rank

#2134MediumFrequency: 10.5%

Maximize the Confusion of an Exam

#115

Rank

#3213MediumFrequency: 10.5%

Count Subarrays Where Max Element Appears at Least K Times

#116

Rank

#2618HardFrequency: 10.5%

Maximize the Minimum Powered City

Array Binary Search Greedy Queue Sliding Window Prefix Sum

#117

Rank

#3463EasyFrequency: 10.3%

Alternating Groups I

#118

Rank

#1286HardFrequency: 8.1%

Constrained Subsequence Sum

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

#119

Rank

#3522MediumFrequency: 8.1%

Find the Power of K-Size Subarrays I

#120

Rank

#3702EasyFrequency: 8.1%

Maximum Subarray With Equal Products

Array Math Sliding Window Enumeration Number Theory

#121

Rank

#3592HardFrequency: 8.1%

Find X-Sum of All K-Long Subarrays II

Array Hash Table Sliding Window Heap (Priority Queue)

#122

Rank

#2866EasyFrequency: 8%

Longest Even Odd Subarray With Threshold

#123

Rank

#3569MediumFrequency: 7.3%

Count of Substrings Containing Every Vowel and K Consonants II

#124

Rank

#2832MediumFrequency: 7.3%

Find the Longest Equal Subarray

#125

Rank

#4318MediumFrequency: 7.3%

Valid Subarrays With Matching Sum Digits I

Array Hash Table Sliding Window Enumeration Prefix Sum

#126

Rank

#1020MediumFrequency: 7.3%

Longest Turbulent Subarray

#127

Rank

#3260HardFrequency: 7.2%

Divide an Array Into Subarrays With Minimum Cost II

Array Hash Table Sliding Window Heap (Priority Queue)

#128

Rank

#1261MediumFrequency: 5.5%

Swap For Longest Repeated Character Substring

#129

Rank

#3196HardFrequency: 5.5%

Apply Operations to Maximize Frequency Score

Array Binary Search Sliding Window Sorting Prefix Sum

#130

Rank

#3502MediumFrequency: 5%

Count Substrings With K-Frequency Characters I

#131

Rank

#3907MediumFrequency: 5%

Count Prime-Gap Balanced Subarrays

Array Math Queue Sliding Window Number Theory Monotonic Queue

#132

Rank

#2275HardFrequency: 5%

Find Substring With Given Hash Value

String Sliding Window Rolling Hash Hash Function

#133

Rank

#1430EasyFrequency: 5%

Find the K-Beauty of a Number

Math String Sliding Window

#134

Rank

#3570MediumFrequency: 5%

Count of Substrings Containing Every Vowel and K Consonants I

#135

Rank

#3573MediumFrequency: 5%

Count Substrings That Can Be Rearranged to Contain a String I

#136

Rank

#4152MediumFrequency: 5%

Minimum Subarray Length With Distinct Sum At Least K

#137

Rank

#4002HardFrequency: 5%

Count Subarrays With K Distinct Integers

#138

Rank

View All Topics

Master Sliding Window in Real Interviews

Get AI-powered assistance when solving sliding window problems during your actual interviews.

Get Started Free

No credit card required

Sliding Window Interview Questions

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

138

Total Problems

Easy

Medium

Hard

Maximum Points You Can Obtain from Cards

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

Rank

#3MediumFrequency: 92.8%

Longest Substring Without Repeating Characters

Rank

#438MediumFrequency: 84.4%

Find All Anagrams in a String

Asked at Databricks

Rank

#1046MediumFrequency: 83.2%

Max Consecutive Ones III

Rank

#2667HardFrequency: 76%

Maximum Frequency Score of a Subarray

Array Hash Table Math Stack Sliding Window

Rank

#76HardFrequency: 74.7%

Minimum Window Substring

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

Rank

#239HardFrequency: 74.4%

Sliding Window Maximum

Asked at Oracle

Rank

#1107MediumFrequency: 71.1%

Minimum Swaps to Group All 1's Together

Rank

#219EasyFrequency: 70.1%

Contains Duplicate II

#10

Rank

#713MediumFrequency: 66.4%

Subarray Product Less Than K

#11

Rank

#1423MediumFrequency: 66.4%

Maximum Number of Occurrences of a Substring

#12

Rank

#220HardFrequency: 65.5%

Contains Duplicate III

Array Sliding Window Sorting Bucket Sort Ordered Set

#13

Rank

#658MediumFrequency: 64.6%

Find K Closest Elements

Asked at DoorDash

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

#14

Rank

#940MediumFrequency: 63.6%

Fruit Into Baskets

#15

Rank

#424MediumFrequency: 59.8%

Longest Repeating Character Replacement

#16

Rank

#480HardFrequency: 57.6%

Sliding Window Median

Array Hash Table Sliding Window Heap (Priority Queue)Treap

#17

Rank

#187MediumFrequency: 57.5%

Repeated DNA Sequences

Hash Table String Bit Manipulation Sliding Window Rolling Hash Hash Function Z Algorithm Boyer–Moore String-Search Algorithm

#18

Rank

#3441MediumFrequency: 55.1%

Equalize Strings by Adding or Removing Characters at Ends

String Binary Search Dynamic Programming Sliding Window Hash Function

#19

Rank

#3958MediumFrequency: 55.1%

Minimum Removals to Balance Array

#20

Rank

#2856MediumFrequency: 54.4%

Count Complete Subarrays in an Array

#21

Rank

#3327HardFrequency: 54.4%

Minimum Moves to Pick K Ones

#22

Rank

#2119HardFrequency: 54.1%

Minimum Number of Operations to Make Array Continuous

#23

Rank

#632HardFrequency: 52.9%

Smallest Range Covering Elements from K Lists

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

#24

Rank

#567MediumFrequency: 52.8%

Permutation in String

Hash Table Two Pointers String Sliding Window

#25

Rank

#1966MediumFrequency: 51.8%

Frequency of the Most Frequent Element

Array Binary Search Greedy Sliding Window Sorting Prefix Sum

#26

Rank

#209MediumFrequency: 51.4%

Minimum Size Subarray Sum

#27

Rank

#395MediumFrequency: 51.4%

Longest Substring with At Least K Repeating Characters

Hash Table String Divide and Conquer Sliding Window

#28

Rank

#2527HardFrequency: 49.9%

Count Subarrays With Fixed Bounds

Array Queue Sliding Window Monotonic Queue

#29

Rank

#340MediumFrequency: 48%

Longest Substring with At Most K Distinct Characters

#30

Rank

#643EasyFrequency: 47.5%

Maximum Average Subarray I

#31

Rank

#2673MediumFrequency: 47.5%

Maximize Win From Two Segments

#32

Rank

#3333MediumFrequency: 47.5%

Find Pattern in Infinite Stream I

Array Sliding Window Rolling Hash String Matching Interactive Hash Function

#33

Rank

#3352HardFrequency: 47.5%

Find Pattern in Infinite Stream II

Array Sliding Window Rolling Hash String Matching Interactive Hash Function

#34

Rank

#3475MediumFrequency: 47.5%

Minimum Operations to Make Binary Array Elements Equal to One I

Array Bit Manipulation Queue Sliding Window Prefix Sum

#35

Rank

#3980MediumFrequency: 47.5%

Best Time to Buy and Sell Stock using Strategy

#36

Rank

#3715MediumFrequency: 47.3%

Maximum Coins From K Consecutive Bags

Array Binary Search Greedy Sliding Window Sorting Prefix Sum

#37

Rank

#1034HardFrequency: 46%

Subarrays with K Different Integers

#38

Rank

#1445MediumFrequency: 44.7%

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

#39

Rank

#1370MediumFrequency: 44%

Count Number of Nice Subarrays

Array Hash Table Math Sliding Window Prefix Sum

#40

Rank

#1967MediumFrequency: 40.9%

Longest Substring Of All Vowels in Order

#41

Rank

#159MediumFrequency: 39.1%

Longest Substring with At Most Two Distinct Characters

#42

Rank

#1567MediumFrequency: 38.9%

Maximum Number of Vowels in a Substring of Given Length

#43

Rank

#30HardFrequency: 38.2%

Substring with Concatenation of All Words

#44

Rank

#2552MediumFrequency: 38.2%

Maximum Sum of Distinct Subarrays With Length K

#45

Rank

#727HardFrequency: 36.9%

Minimum Window Subsequence

#46

Rank

#689HardFrequency: 36.8%

Maximum Sum of 3 Non-Overlapping Subarrays

Array Dynamic Programming Sliding Window Prefix Sum

#47

Rank

#966MediumFrequency: 36.3%

Binary Subarrays With Sum

Array Hash Table Sliding Window Prefix Sum

#48

Rank

#1873EasyFrequency: 34.3%

Longest Nice Substring

Hash Table String Divide and Conquer Bit Manipulation Sliding Window

#49

Rank

#3267MediumFrequency: 33.1%

Find Longest Special Substring That Occurs Thrice I

Hash Table String Binary Search Sliding Window Counting

#50

Rank

#3610EasyFrequency: 33.1%

Find X-Sum of All K-Long Subarrays I

Array Hash Table Sliding Window Heap (Priority Queue)

#51

Rank

#1122HardFrequency: 33%

Longest Duplicate Substring

String Binary Search Sliding Window Rolling Hash Suffix Array Hash Function Suffix Automaton Suffix Tree Z Algorithm Boyer–Moore String-Search Algorithm

#52

Rank

#1460MediumFrequency: 32.8%

Number of Substrings Containing All Three Characters

#53

Rank

#2868MediumFrequency: 31.8%

Continuous Subarrays

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

#54

Rank

#2751MediumFrequency: 31.3%

Sliding Subarray Beauty

#55

Rank

#1805HardFrequency: 31.1%

Minimum Adjacent Swaps for K Consecutive Ones

#56

Rank

#867MediumFrequency: 29.7%

New 21 Game

Math Dynamic Programming Sliding Window Probability and Statistics

#57

Rank

#2247MediumFrequency: 29.3%

Number of Unique Flavors After Sharing K Candies

#58

Rank

#892HardFrequency: 29.1%

Shortest Subarray with Sum at Least K

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

#59

Rank

#3622MediumFrequency: 28.9%

Maximum Frequency of an Element After Performing Operations I

Array Binary Search Sliding Window Sorting Prefix Sum

#60

Rank

#2891MediumFrequency: 28.1%

Maximum Beauty of an Array After Applying Operation

#61

Rank

#1813MediumFrequency: 27.8%

Maximum Erasure Value

#62

Rank

#2833MediumFrequency: 27.8%

Count Zero Request Servers

Array Hash Table Sliding Window Sorting

#63

Rank

#3362HardFrequency: 27.3%

Find the Median of the Uniqueness Array

#64

Rank

#1586MediumFrequency: 27.3%

Longest Subarray of 1's After Deleting One Element

#65

Rank

#1776MediumFrequency: 27.2%

Minimum Operations to Reduce X to Zero

Array Hash Table Binary Search Sliding Window Prefix Sum

#66

Rank

#3743MediumFrequency: 27.2%

Reschedule Meetings for Maximum Free Time I

Array Greedy Sliding Window

#67

Rank

#594EasyFrequency: 27.2%

Longest Harmonious Subsequence

Array Hash Table Sliding Window Sorting Counting

#68

Rank

#2449HardFrequency: 26.5%

Maximum Number of Robots Within Budget

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

#69

Rank

#2017MediumFrequency: 25.4%

Minimum Number of Flips to Make the Binary String Alternating

#70

Rank

#2233MediumFrequency: 25.1%

Number of Smooth Descent Periods of a Stock

Array Math Two Pointers Dynamic Programming Sliding Window

#71

Rank

#2255MediumFrequency: 24.6%

Minimum Swaps to Group All 1's Together II

#72

Rank

#413MediumFrequency: 24.6%

Arithmetic Slices

#73

Rank

#2626MediumFrequency: 24.6%

Count the Number of Good Subarrays

#74

Rank

#3225MediumFrequency: 24.6%

Length of Longest Subarray With at Most K Frequency

#75

Rank

#3640HardFrequency: 24.4%

Maximum Frequency of an Element After Performing Operations II

Array Binary Search Sliding Window Sorting Prefix Sum

#76

Rank

#3674HardFrequency: 24.4%

Count Non-Decreasing Subarrays After K Operations

Array Stack Segment Tree Queue Sliding Window Monotonic Stack Monotonic Queue

#77

Rank

#2498MediumFrequency: 23.6%

Smallest Subarrays With Maximum Bitwise OR

Array Binary Search Bit Manipulation Sliding Window

#78

Rank

#2884HardFrequency: 23.6%

Length of the Longest Valid Substring

Array Hash Table String Sliding Window

#79

Rank

#2478MediumFrequency: 22.5%

Longest Nice Subarray

#80

Rank

#2001MediumFrequency: 22.1%

Jump Game VII

String Dynamic Programming Sliding Window Prefix Sum

#81

Rank

#1138MediumFrequency: 21.9%

Grumpy Bookstore Owner

#82

Rank

#1755EasyFrequency: 21.9%

Defuse the Bomb

#83

Rank

#1113MediumFrequency: 21.5%

Moving Stones Until Consecutive II

Array Math Sliding Window Sorting

#84

Rank

#2394HardFrequency: 20.9%

Count Subarrays With Score Less Than K

#85

Rank

#3483MediumFrequency: 20.9%

Alternating Groups II

#86

Rank

#1084MediumFrequency: 20%

Find K-Length Substrings With No Repeated Characters

#87

Rank

#1280EasyFrequency: 20%

Diet Plan Performance

#88

Rank

#2003MediumFrequency: 20%

Distinct Numbers in Each Subarray

#89

Rank

#2112EasyFrequency: 20%

Minimum Difference Between Highest and Lowest of K Scores

Array Sliding Window Sorting

#90

Rank

#2954MediumFrequency: 20%

Maximum Sum of Almost Unique Subarray

#91

Rank

#487MediumFrequency: 19.5%

Max Consecutive Ones II

#92

Rank

#1065MediumFrequency: 19.5%

Binary String With Substrings Representing 1 To N

Hash Table String Bit Manipulation Sliding Window

#93

Rank

#1622HardFrequency: 19.5%

Max Value of Equation

Array Queue Sliding Window Heap (Priority Queue)Monotonic Queue

#94

Rank

#3761HardFrequency: 19.5%

Maximum Difference Between Even and Odd Frequency II

String Sliding Window Enumeration Prefix Sum

#95

Rank

#2211MediumFrequency: 19.4%

K Radius Subarray Averages

#96

Rank

#683HardFrequency: 18%

K Empty Slots

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

#97

Rank

#1573MediumFrequency: 18%

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

Array Hash Table Binary Search Dynamic Programming Sliding Window

#98

Rank

#2069MediumFrequency: 18%

Kth Smallest Subarray Sum

#99

Rank

#3266MediumFrequency: 18%

Find Longest Special Substring That Occurs Thrice II

Hash Table String Binary Search Sliding Window Counting

#100

Rank

#2338MediumFrequency: 18%

Minimum Consecutive Cards to Pick Up

#101

Rank

#718MediumFrequency: 18%

Maximum Length of Repeated Subarray

Array Binary Search Dynamic Programming Sliding Window Rolling Hash Hash Function

#102

Rank

#3349EasyFrequency: 17%

Maximum Length Substring With Two Occurrences

#103

Rank

#2359MediumFrequency: 16.4%

Maximum White Tiles Covered by a Carpet

Array Binary Search Greedy Sliding Window Sorting Prefix Sum

#104

Rank

#1037HardFrequency: 16.4%

Minimum Number of K Consecutive Bit Flips

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

#105

Rank

#2463EasyFrequency: 14.6%

Minimum Recolors to Get K Consecutive Black Blocks

#106

Rank

#2599MediumFrequency: 13.2%

Take K of Each Character From Left and Right

#107

Rank

#1096MediumFrequency: 13.2%

Maximum Sum of Two Non-Overlapping Subarrays

#108

Rank

#2229HardFrequency: 12.6%

Maximum Fruits Harvested After at Most K Steps

#109

Rank

#1987EasyFrequency: 12%

Substrings of Size Three with Distinct Characters

Hash Table String Sliding Window Counting

#110

Rank

#1321MediumFrequency: 12%

Get Equal Substrings Within Budget

#111

Rank

#3380MediumFrequency: 11.4%

Shortest Subarray With OR at Least K II

#112

Rank

#3835MediumFrequency: 11.4%

Count Partitions With Max-Min Difference at Most K

Array Dynamic Programming Queue Sliding Window Prefix Sum Monotonic Queue

#113

Rank

#1733HardFrequency: 10.5%

Maximum Number of Visible Points

Array Math Geometry Sliding Window Sorting

#114

Rank

#2134MediumFrequency: 10.5%

Maximize the Confusion of an Exam

#115

Rank

#3213MediumFrequency: 10.5%

Count Subarrays Where Max Element Appears at Least K Times

#116

Rank

#2618HardFrequency: 10.5%

Maximize the Minimum Powered City

Array Binary Search Greedy Queue Sliding Window Prefix Sum

#117

Rank

#3463EasyFrequency: 10.3%

Alternating Groups I

#118

Rank

#1286HardFrequency: 8.1%

Constrained Subsequence Sum

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

#119

Rank

#3522MediumFrequency: 8.1%

Find the Power of K-Size Subarrays I

#120

Rank

#3702EasyFrequency: 8.1%

Maximum Subarray With Equal Products

Array Math Sliding Window Enumeration Number Theory

#121

Rank

#3592HardFrequency: 8.1%

Find X-Sum of All K-Long Subarrays II

Array Hash Table Sliding Window Heap (Priority Queue)

#122

Rank

#2866EasyFrequency: 8%

Longest Even Odd Subarray With Threshold

#123

Rank

#3569MediumFrequency: 7.3%

Count of Substrings Containing Every Vowel and K Consonants II

#124

Rank

#2832MediumFrequency: 7.3%

Find the Longest Equal Subarray

#125

Rank

#4318MediumFrequency: 7.3%

Valid Subarrays With Matching Sum Digits I

Array Hash Table Sliding Window Enumeration Prefix Sum

#126

Rank

#1020MediumFrequency: 7.3%

Longest Turbulent Subarray

#127

Rank

#3260HardFrequency: 7.2%

Divide an Array Into Subarrays With Minimum Cost II

Array Hash Table Sliding Window Heap (Priority Queue)

#128

Rank

#1261MediumFrequency: 5.5%

Swap For Longest Repeated Character Substring

#129

Rank

#3196HardFrequency: 5.5%

Apply Operations to Maximize Frequency Score

Array Binary Search Sliding Window Sorting Prefix Sum

#130

Rank

#3502MediumFrequency: 5%

Count Substrings With K-Frequency Characters I

#131

Rank

#3907MediumFrequency: 5%

Count Prime-Gap Balanced Subarrays

Array Math Queue Sliding Window Number Theory Monotonic Queue

#132

Rank

#2275HardFrequency: 5%

Find Substring With Given Hash Value

String Sliding Window Rolling Hash Hash Function

#133

Rank

#1430EasyFrequency: 5%

Find the K-Beauty of a Number

Math String Sliding Window

#134

Rank

#3570MediumFrequency: 5%

Count of Substrings Containing Every Vowel and K Consonants I

#135

Rank

#3573MediumFrequency: 5%

Count Substrings That Can Be Rearranged to Contain a String I

#136

Rank

#4152MediumFrequency: 5%

Minimum Subarray Length With Distinct Sum At Least K

#137

Rank

#4002HardFrequency: 5%

Count Subarrays With K Distinct Integers