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Problems

870 problems

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Array2,209String870Hash Table786Math682Dynamic Programming666Sorting504Greedy480Binary Search352Depth-First Search335Database303Bit Manipulation283Matrix278Tree261Breadth-First Search255Two Pointers249All topics

With video · 870 results

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TitleSolutionAcceptDifficultyTopics
792. Number of Matching SubsequencesVideo
Solution50.8%Medium
Array, Binary Search +5· 9 companies
796. Rotate StringVideo
Solution66.6%Easy
String, String Matching· 12 companies
800. Similar RGB ColorVideoPremium
Solution68.6%Easy
Enumeration, Math +1· 1 company
804. Unique Morse Code WordsVideo
Solution83.6%Easy
Array, Hash Table +1· 3 companies
806. Number of Lines To Write StringVideo
Solution72.9%Easy
Array, String· 2 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
819. Most Common WordVideo
Solution45.0%Easy
Array, Counting +2· 5 companies
820. Short Encoding of WordsVideo
Solution61.0%Medium
Array, Hash Table +2· 1 company
821. Shortest Distance to a CharacterVideo
Solution72.7%Easy
Array, String +1· 4 companies
824. Goat LatinVideo
Solution69.9%Easy
String· 4 companies
828. Count Unique Characters of All Substrings of a Given StringVideo
Solution54.1%Hard
Dynamic Programming, Hash Table +1· 3 companies
830. Positions of Large GroupsVideo
Solution54.4%Easy
String· 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
839. Similar String GroupsVideo
Solution56.7%Hard
Array, Breadth-First Search +4· 5 companies
842. Split Array into Fibonacci SequenceVideo
Solution40.3%Medium
Backtracking, String· 2 companies
843. Guess the WordVideo
Solution36.9%Hard
Array, Game Theory +3· 10 companies
844. Backspace String CompareVideo
Solution49.9%Easy
Simulation, Stack +2· 14 companies
848. Shifting LettersVideo
Solution46.1%Medium
Array, Prefix Sum +1· 3 companies
854. K-Similar StringsVideo
Solution41.3%Hard
Breadth-First Search, String· 2 companies
856. Score of ParenthesesVideo
Solution66.0%Medium
Stack, String· 5 companies
859. Buddy StringsVideo
Solution34.0%Easy
Hash Table, String· 5 companies
880. Decoded String at IndexVideo
Solution37.3%Medium
Stack, String· 5 companies
884. Uncommon Words from Two SentencesVideo
Solution75.8%Easy
Counting, Hash Table +1· 2 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
899. Orderly QueueVideo
Solution67.4%Hard
Math, Sorting +1· 2 companies
902. Numbers At Most N Given Digit SetVideo
Solution45.9%Hard
Array, Binary Search +3· 4 companies
903. Valid Permutations for DI SequenceVideo
Solution56.9%Hard
Dynamic Programming, Prefix Sum +1
916. Word SubsetsVideo
Solution55.9%Medium
Array, Hash Table +1· 6 companies
917. Reverse Only LettersVideo
Solution68.9%Easy
String, Two Pointers· 5 companies
921. Minimum Add to Make Parentheses ValidVideo
Solution74.7%Medium
Greedy, Stack +1· 7 companies
925. Long Pressed NameVideo
Solution32.8%Easy
String, Two Pointers· 7 companies
926. Flip String to Monotone IncreasingVideo
Solution61.5%Medium
Dynamic Programming, String· 5 companies
929. Unique Email AddressesVideo
Solution67.9%Easy
Array, Hash Table +1· 5 companies
936. Stamping The SequenceVideo
Solution62.2%Hard
Greedy, Queue +2· 1 company
937. Reorder Data in Log FilesVideo
Solution56.6%Medium
Array, Sorting +1· 4 companies
940. Distinct Subsequences IIVideo
Solution56.7%Hard
Dynamic Programming, String· 2 companies
942. DI String MatchVideo
Solution81.0%Easy
Array, Greedy +2· 3 companies
943. Find the Shortest SuperstringVideo
Solution45.8%Hard
Array, Bit Manipulation +3· 2 companies
944. Delete Columns to Make SortedVideo
Solution78.1%Easy
Array, String· 4 companies
949. Largest Time for Given DigitsVideo
Solution36.0%Medium
Array, Enumeration +1· 3 companies
953. Verifying an Alien DictionaryVideo
Solution55.9%Easy
Array, Hash Table +1· 8 companies
955. Delete Columns to Make Sorted IIVideo
Solution49.7%Medium
Array, Greedy +1· 3 companies
960. Delete Columns to Make Sorted IIIVideo
Solution72.7%Hard
Array, Dynamic Programming +1· 2 companies
966. Vowel SpellcheckerVideo
Solution61.4%Medium
Array, Hash Table +1· 7 companies
972. Equal Rational NumbersVideo
Solution47.9%Hard
Math, String· 2 companies
Showing 201–250 of 870