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2,093 problems

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Array1,196 Hash Table465 String434 Greedy327 Math327 Dynamic Programming324 Sorting300 Depth-First Search208 Binary Search187 Breadth-First Search165 Matrix163 Tree157 Prefix Sum153 Two Pointers148 Database135 All topics

Medium · With video · 2,093 results

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TitleSolutionAcceptDifficultyTopics

3998. Transform Binary String Using Subsequence SortVideo

–37.9%Medium

Array, Greedy +2

4001. Aggregate Two Time SeriesVideo

Solution57.9%Medium

Array, Two Pointers

4002. Count Valid SequencesVideo

Solution42.5%Medium

Combinatorics, Math

4008. Minimum Initial Strength to Defeat All MonstersVideo

Solution50.1%Medium

Array, Binary Search +2

4011. Count Subarrays With Even Odd Ratio IVideo

Solution60.6%Medium

Array, Binary Indexed Tree +4

4012. Count of Unfinished Tasks After Each ShiftVideo

Solution41.9%Medium

Array, Binary Search +1

4014. Minimum Total Price After Applying DiscountsVideo

Solution71.8%Medium

Array, Greedy +2

4015. Weighted Sum of a TreeVideo

Solution41.7%Medium

Array, Depth-First Search +1

4016. Maximum Area of Two Non-Overlapping Square SubmatricesVideo

Solution40.9%Medium

Array, Binary Search +2

4019. Merge Close Characters IIVideoPremium

Solution78.7%Medium

–

4021. Minimum Operations to Make a Rotated Palindrome IVideo

Solution63.9%Medium

Enumeration, Math +1

4022. K-th Digit in Infinite StringVideo

Solution35.1%Medium

Binary Search, Math

4025. Minimize the Maximum Waiting Time at Synchronized Traffic LightsVideo

Solution64.7%Medium

4026. Maximum Gap Between StationsVideo

Solution52.4%Medium

Greedy, String +1

4031. Find All Numbers Disappeared in an Array IIVideo

Solution52.8%Medium

Array, Binary Search +1

4032. Longest Subarray With at Most K Distinct Prime FactorsVideo

Solution56.5%Medium

Array, Hash Table +3

4034. Minimum Bishop Moves to Reach TargetVideo

Solution65.4%Medium

4035. Maximum Valid Split Positions IVideo

Solution51.8%Medium

Array, Enumeration +2

4036. Lexicographically Largest String After Pair TransformationsVideo

Solution42.8%Medium

Array, Bit Manipulation +2

4039. Sum of Decoded NumbersVideo

Solution44.8%Medium

4040. Minimum Operations to Form Subset Sum IVideo

Solution52.4%Medium

Array, Dynamic Programming

4044. Count Good Cyclic RotationsVideo

Solution49.0%Medium

Array, Prefix Sum +1

4045. Count Robot GroupsVideo

–31.9%Medium

Array, Monotonic Stack +1

4049. Count Values With Equally Spaced Occurrences IIVideo

Solution62.9%Medium

Array, Hash Table

4050. Minimum Days to Score Exactly N PointsVideo

Solution42.2%Medium

Dynamic Programming, Math

4053. Minimum Operations to Make Every Element PalindromicVideo

Solution15.5%Medium

Array, Binary Search

4054. Count Shadow Pairs IVideo

–41.8%Medium

Array, Monotonic Stack +1

4057. Number of Intersecting Interval Pairs IIVideo

Solution50.3%Medium

Array, Binary Search +1

4058. Maximum Pulse Value After One Subarray RotationVideo

–38.9%Medium

Array, Dynamic Programming +1

4062. Transform Array Using Pair OperationsVideo

Solution60.8%Medium

Array, Brainteaser

4063. Longest Subarray Divisible by K with At Most One Negation IVideo

Solution34.2%Medium

Array, Hash Table +1

4066. Maximum Equal Adjacent Pairs After at Most One ReplacementVideo

Solution49.8%Medium

Array, Counting +1

4067. Longest Subarray With Restricted Pair SumsVideo

Solution37.8%Medium

Array, Hash Table +1

4071. Minimum Rotations to Dial a Number IIVideo

Solution53.8%Medium

–

4072. Maximum Alternating Subarray Sum With One DeletionVideo

–29.6%Medium

–

4075. Longest Resilient Subarray IVideo

Solution37.5%Medium

–

4076. Longest Resilient Subarray IIVideo

Solution57.7%Medium

–

4079. Prime Subset Selection IVideo

Solution44.6%Medium

–

4080. Design Bus Seat Booking SystemVideo

Solution47.3%Medium

–

4084. Last Visited Cell in a Directional GridVideo

Solution67.5%Medium

–

4085. Find Root of a Colored TreeVideo

Solution43.5%Medium

–

4089. Count Subarrays With Loose BoundsVideo

–50.0%Medium

–

4090. Count Magical Substring Pairs IVideo

–43.1%Medium

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Showing 2,051–2,093 of 2,093