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437 problems

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Array1,212 Hash Table473 String437 Math331 Greedy330 Dynamic Programming327 Sorting302 Depth-First Search208 Binary Search189 Breadth-First Search166 Matrix163 Tree158 Prefix Sum155 Two Pointers150 Database137 All topics

Medium · 437 results

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TitleSolutionAcceptDifficultyTopics

763. Partition LabelsVideo

Solution81.8%Medium

Greedy, Hash Table +2· 9 companies

767. Reorganize StringVideo

Solution57.5%Medium

Counting, Greedy +4· 20 companies

777. Swap Adjacent in LR StringVideo

Solution38.5%Medium

String, Two Pointers· 3 companies

784. Letter Case PermutationVideo

Solution75.7%Medium

Backtracking, Bit Manipulation +1· 7 companies

791. Custom Sort StringVideo

Solution72.3%Medium

Hash Table, Sorting +1· 5 companies

792. Number of Matching SubsequencesVideo

Solution50.8%Medium

Array, Binary Search +5· 9 companies

809. Expressive WordsVideo

Solution46.8%Medium

Array, String +1· 2 companies

811. Subdomain Visit CountVideo

Solution77.2%Medium

Array, Counting +2· 4 companies

816. Ambiguous CoordinatesVideo

Solution56.4%Medium

Backtracking, Enumeration +1· 1 company

820. Short Encoding of WordsVideo

Solution61.0%Medium

Array, Hash Table +2· 1 company

831. Masking Personal InformationVideo

Solution56.2%Medium

String· 3 companies

833. Find And Replace in StringVideo

Solution50.9%Medium

Array, Hash Table +2· 2 companies

838. Push DominoesVideo

Solution63.0%Medium

Dynamic Programming, String +1· 6 companies

842. Split Array into Fibonacci SequenceVideo

Solution40.3%Medium

Backtracking, String· 2 companies

848. Shifting LettersVideo

Solution46.1%Medium

Array, Prefix Sum +1· 3 companies

856. Score of ParenthesesVideo

Solution66.0%Medium

Stack, String· 5 companies

880. Decoded String at IndexVideo

Solution37.3%Medium

Stack, String· 5 companies

890. Find and Replace PatternVideo

Solution76.8%Medium

Array, Hash Table +1· 2 companies

893. Groups of Special-Equivalent StringsVideo

Solution73.5%Medium

Array, Hash Table +2· 1 company

916. Word SubsetsVideo

Solution55.9%Medium

Array, Hash Table +1· 6 companies

921. Minimum Add to Make Parentheses ValidVideo

Solution74.7%Medium

Greedy, Stack +1· 7 companies

926. Flip String to Monotone IncreasingVideo

Solution61.5%Medium

Dynamic Programming, String· 5 companies

937. Reorder Data in Log FilesVideo

Solution56.6%Medium

Array, Sorting +1· 4 companies

949. Largest Time for Given DigitsVideo

Solution36.0%Medium

Array, Enumeration +1· 3 companies

955. Delete Columns to Make Sorted IIVideo

Solution49.7%Medium

Array, Greedy +1· 3 companies

966. Vowel SpellcheckerVideo

Solution61.4%Medium

Array, Hash Table +1· 7 companies

981. Time Based Key-Value StoreVideo

Solution49.8%Medium

Binary Search, Design +2· 34 companies

984. String Without AAA or BBBVideo

Solution45.6%Medium

Greedy, String· 3 companies

988. Smallest String Starting From LeafVideo

Solution61.2%Medium

Backtracking, Binary Tree +3· 2 companies

990. Satisfiability of Equality EquationsVideo

Solution52.2%Medium

Array, Graph +2· 6 companies

1003. Check If Word Is Valid After SubstitutionsVideo

Solution61.1%Medium

Stack, String· 1 company

1016. Binary String With Substrings Representing 1 To NVideo

Solution58.5%Medium

String· 2 companies

1023. Camelcase MatchingVideo

Solution65.8%Medium

Array, String +3· 2 companies

1041. Robot Bounded In CircleVideo

Solution56.6%Medium

Math, Simulation +1· 11 companies

1048. Longest String ChainVideo

Solution63.5%Medium

Array, Dynamic Programming +4· 16 companies

1055. Shortest Way to Form StringVideoPremium

Solution61.6%Medium

Binary Search, Greedy +2· 3 companies

1058. Minimize Rounding Error to Meet TargetVideoPremium

Solution45.9%Medium

Array, Greedy +3· 1 company

1061. Lexicographically Smallest Equivalent StringVideo

Solution81.1%Medium

String, Union Find· 5 companies

1062. Longest Repeating SubstringVideoPremium

Solution63.4%Medium

Binary Search, Dynamic Programming +4· 4 companies

1079. Letter Tile PossibilitiesVideo

Solution83.5%Medium

Backtracking, Counting +2· 5 companies

1081. Smallest Subsequence of Distinct CharactersVideo

Solution70.6%Medium

Greedy, Monotonic Stack +2· 5 companies

1087. Brace ExpansionVideoPremium

Solution66.5%Medium

Backtracking, Breadth-First Search +1· 6 companies

1100. Find K-Length Substrings With No Repeated CharactersVideoPremium

Solution76.5%Medium

Hash Table, Sliding Window +1· 1 company

1111. Maximum Nesting Depth of Two Valid Parentheses StringsVideo

Solution82.9%Medium

Stack, String· 3 companies

1138. Alphabet Board PathVideo

Solution52.1%Medium

Hash Table, String· 1 company

1143. Longest Common SubsequenceVideo

Solution59.6%Medium

Dynamic Programming, String· 19 companies

1156. Swap For Longest Repeated Character SubstringVideo

Solution44.9%Medium

Hash Table, Sliding Window +1· 2 companies

1166. Design File SystemVideoPremium

Solution65.1%Medium

Design, Hash Table +2· 12 companies

1169. Invalid TransactionsVideo

Solution32.7%Medium

Array, Hash Table +2· 7 companies

1170. Compare Strings by Frequency of the Smallest CharacterVideo

Solution63.3%Medium

Array, Binary Search +3· 1 company

Showing 101–150 of 437