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985 problems

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Array578 Dynamic Programming332 String191 Math187 Binary Search136 Hash Table134 Sorting106 Greedy104 Bit Manipulation103 Graph96 Depth-First Search91 Heap (Priority Queue)78 Prefix Sum77 Matrix75 Breadth-First Search71 All topics

Hard · 985 results

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TitleSolutionAcceptDifficultyTopics

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

3888. Minimum Operations to Make All Grid Elements EqualPremium

Solution61.3%Hard

–

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

3911. K-th Smallest Remaining Even Integer in Subarray QueriesVideo

–28.6%Hard

Array, Binary Search

3915. Maximum Sum of Alternating Subsequence With Distance at Least KVideo

Solution30.7%Hard

Array, Dynamic Programming +1· 1 company

3916. Number of ZigZag Arrays IIIPremium

–62.2%Hard

–

3920. Maximize Fixed Points After DeletionsVideo

–19.9%Hard

Array, Binary Search +1· 1 company

3924. Minimum Threshold Path With Limited Heavy EdgesVideo

–39.0%Hard

Binary Search, Breadth-First Search +1

3928. Minimum Cost to Buy Apples IIVideo

–31.8%Hard

Array, Graph +2· 1 company

3929. Minimum Partition Score IIPremium

–43.5%Hard

–

3930. Power Update After K-th Largest Insertion IIPremium

Solution79.2%Hard

–

3934. Smallest Unique SubarrayVideo

Solution39.7%Hard

Array, Binary Search +4

3939. Count Non Adjacent Subsets in a Rooted TreeVideo

–51.7%Hard

Array, Depth-First Search +2· 1 company

3943. Number of Pairs After IncrementVideo

–20.9%Hard

Array, Counting +2

3944. Minimum Operations to Make Array Modulo Alternating IIPremium

–64.5%Hard

–

3948. Lexicographically Maximum MEX ArrayVideo

–53.6%Hard

Array, Greedy +2· 2 companies

3949. Subtree Inversion Sum IIPremium

–68.9%Hard

–

3953. Maximum Score with Co-Prime ElementVideo

–27.5%Hard

Array, Combinatorics +4· 2 companies

3956. Maximum Sum of M Non-Overlapping Subarrays IVideo

–26.3%Hard

Array, Binary Search +5

3957. Maximum Sum of M Non-Overlapping Subarrays IIVideo

–16.6%Hard

Array, Binary Search +5

3962. Maximum Subarray Sum After at Most K SwapsVideo

Solution14.2%Hard

Array, Binary Indexed Tree +5· 1 company

3966. Count Good Integers in a RangeVideo

–49.8%Hard

Dynamic Programming, Math

3967. Finish Time of Tasks IIPremium

–18.9%Hard

–

3971. Maximum Total ValueVideo

–29.7%Hard

Array, Binary Search +2· 1 company

3972. Valid Subarrays With Matching Sum Digits IIPremium

–25.6%Hard

–

3973. Distinct Gate Paths to LCAPremium

–59.1%Hard

–

3977. Minimum Time to Reach Target With Limited PowerVideo

Solution40.4%Hard

Array, Dynamic Programming +3

3981. Count Distinct Ways to Form Target from Two StringsVideo

–46.4%Hard

Dynamic Programming, Prefix Sum +1

Showing 901–950 of 985