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942 problems

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Array566 Dynamic Programming328 String188 Math182 Binary Search133 Hash Table132 Sorting104 Greedy102 Bit Manipulation101 Graph92 Depth-First Search88 Heap (Priority Queue)77 Prefix Sum75 Matrix74 Breadth-First Search70 All topics

Hard · With video · 942 results

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TitleSolutionAcceptDifficultyTopics

3699. Number of ZigZag Arrays IVideo

Solution50.2%Hard

Dynamic Programming, Prefix Sum· 5 companies

3700. Number of ZigZag Arrays IIVideo

Solution67.7%Hard

Dynamic Programming, Math· 3 companies

3704. Count No-Zero Pairs That Sum to NVideo

Solution15.6%Hard

Dynamic Programming, Math

3710. Maximum Partition FactorVideo

–31.8%Hard

Array, Binary Search +4· 2 companies

3715. Sum of Perfect Square AncestorsVideo

–41.3%Hard

Array, Counting +5· 3 companies

3721. Longest Balanced Subarray IIVideo

Solution33.7%Hard

Array, Divide and Conquer +3· 2 companies

3725. Count Ways to Choose Coprime Integers from RowsVideo

–46.8%Hard

Array, Combinatorics +4

3729. Count Distinct Subarrays Divisible by K in Sorted ArrayVideo

Solution27.4%Hard

Array, Hash Table +1

3734. Lexicographically Smallest Palindromic Permutation Greater Than TargetVideo

Solution55.3%Hard

Enumeration, String +1

3739. Count Subarrays With Majority Element IIVideo

Solution65.2%Hard

Array, Divide and Conquer +4· 2 companies

3743. Maximize Cyclic Partition ScoreVideo

–14.5%Hard

Array, Dynamic Programming· 2 companies

3748. Count Stable SubarraysVideo

Solution31.9%Hard

Array, Binary Search +1

3753. Total Waviness of Numbers in Range IIVideo

Solution56.2%Hard

Dynamic Programming, Math· 4 companies

3757. Number of Effective SubsequencesVideo

–30.4%Hard

Array, Bit Manipulation +3

3762. Minimum Operations to Equalize SubarraysVideo

–20.0%Hard

Array, Binary Search +2

3764. Most Common Course PairsVideo

Solution56.6%Hard

–

3768. Minimum Inversion Count in Subarrays of Fixed LengthVideo

–40.3%Hard

Array, Segment Tree +1

3772. Maximum Subgraph Score in a TreeVideo

–65.4%Hard

Array, Depth-First Search +2· 1 company

3777. Minimum Deletions to Make Alternating SubstringVideo

Solution43.0%Hard

Segment Tree, String

3782. Last Remaining Integer After Alternating Deletion OperationsVideo

–46.3%Hard

Math, Recursion

3785. Minimum Swaps to Avoid Forbidden ValuesVideo

–30.4%Hard

Array, Counting +2· 1 company

3786. Total Sum of Interaction Cost in Tree GroupsVideo

–50.8%Hard

Array, Depth-First Search +1· 1 company

3791. Number of Balanced Integers in a RangeVideo

Solution35.0%Hard

Dynamic Programming

3797. Count Routes to Climb a Rectangular GridVideo

–23.1%Hard

Array, Dynamic Programming +2· 1 company

3801. Minimum Cost to Merge Sorted ListsVideo

Solution33.8%Hard

Array, Binary Search +3

3806. Maximum Bitwise AND After Increment OperationsVideo

Solution31.8%Hard

Array, Bit Manipulation +2· 1 company

3812. Minimum Edge Toggles on a TreeVideo

Solution65.6%Hard

Depth-First Search, Graph +3

3816. Lexicographically Smallest String After Deleting Duplicate CharactersVideo

Solution20.9%Hard

Greedy, Hash Table +3· 2 companies

3821. Find Nth Smallest Integer With K One BitsVideo

Solution34.7%Hard

Bit Manipulation, Combinatorics +1· 1 company

3826. Minimum Partition ScoreVideo

–32.6%Hard

Array, Divide and Conquer +4

3830. Longest Alternating Subarray After Removing At Most One ElementVideo

Solution30.9%Hard

Array, Dynamic Programming +1

3832. Find Users with Persistent Behavior PatternsVideo

Solution48.3%Hard

–

3836. Maximum Score Using Exactly K PairsVideo

Solution41.4%Hard

Array, Dynamic Programming

3841. Palindromic Path Queries in a TreeVideo

–34.8%Hard

Array, Divide and Conquer +3

3845. Maximum Subarray XOR with Bounded RangeVideo

Solution32.3%Hard

Array, Bit Manipulation +5

3850. Count Sequences to KVideo

Solution35.6%Hard

Array, Dynamic Programming +3· 2 companies

3855. Sum of K-Digit Numbers in a RangeVideo

Solution46.5%Hard

Combinatorics, Divide and Conquer +2

3859. Count Subarrays With K Distinct IntegersVideo

Solution21.0%Hard

Array, Counting +2

3864. Minimum Cost to Partition a Binary StringVideo

Solution50.5%Hard

Divide and Conquer, Prefix Sum +1· 1 company

3869. Count Fancy Numbers in a RangeVideo

Solution26.6%Hard

Dynamic Programming, Math

3873. Maximum Points Activated with One AdditionVideo

Solution42.8%Hard

Array, Hash Table +1

3878. Count Good SubarraysVideo

Solution26.2%Hard

Array, Bit Manipulation +2· 3 companies

3883. Count Non Decreasing Arrays With Given Digit SumsVideo

–40.3%Hard

Array, Dynamic Programming +1· 1 company

3886. Sum of Sortable IntegersVideo

Solution55.3%Hard

Array, Enumeration +2

3887. Incremental Even-Weighted Cycle QueriesVideo

–49.1%Hard

Graph, Union Find

3892. Minimum Operations to Achieve At Least K PeaksVideo

–29.8%Hard

Array, Dynamic Programming

3897. Maximum Value of Concatenated Binary SegmentsVideo

Solution26.7%Hard

Array, Greedy +1

3901. Good Subsequence QueriesVideo

Solution19.9%Hard

Array, Math +2· 2 companies

3906. Count Good Integers on a Grid PathVideo

Solution45.8%Hard

Dynamic Programming

3910. Count Connected Subgraphs with Even Node SumVideo

Solution59.0%Hard

Array, Bit Manipulation +5

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