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Problems

2,133 problems

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Array1,212Hash Table473String437Math331Greedy330Dynamic Programming327Sorting302Depth-First Search208Binary Search189Breadth-First Search166Matrix163Tree158Prefix Sum155Two Pointers150Database137All topics

Medium · 2,133 results

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TitleSolutionAcceptDifficultyTopics
807. Max Increase to Keep City SkylineVideo
Solution86.2%Medium
Array, Greedy +1· 3 companies
808. Soup ServingsVideo
Solution59.7%Medium
Dynamic Programming, Math +1· 3 companies
809. Expressive WordsVideo
Solution46.8%Medium
Array, String +1· 2 companies
811. Subdomain Visit CountVideo
Solution77.2%Medium
Array, Counting +2· 4 companies
813. Largest Sum of AveragesVideo
Solution55.5%Medium
Array, Dynamic Programming +1· 2 companies
814. Binary Tree PruningVideo
Solution72.3%Medium
Binary Tree, Depth-First Search +1· 5 companies
816. Ambiguous CoordinatesVideo
Solution56.4%Medium
Backtracking, Enumeration +1· 1 company
817. Linked List ComponentsVideo
Solution58.4%Medium
Array, Hash Table +1· 4 companies
820. Short Encoding of WordsVideo
Solution61.0%Medium
Array, Hash Table +2· 1 company
822. Card Flipping GameVideo
Solution51.3%Medium
Array, Hash Table· 1 company
823. Binary Trees With FactorsVideo
Solution52.9%Medium
Array, Dynamic Programming +2· 2 companies
825. Friends Of Appropriate AgesVideo
Solution49.9%Medium
Array, Binary Search +2· 3 companies
826. Most Profit Assigning WorkVideo
Solution56.4%Medium
Array, Binary Search +3· 5 companies
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
835. Image OverlapVideo
Solution70.6%Medium
Array, Matrix· 1 company
837. New 21 GameVideo
Solution52.0%Medium
Dynamic Programming, Math +2· 5 companies
838. Push DominoesVideo
Solution63.0%Medium
Dynamic Programming, String +1· 6 companies
840. Magic Squares In GridVideo
Solution55.1%Medium
Array, Hash Table +2· 5 companies
841. Keys and RoomsVideo
Solution76.2%Medium
Breadth-First Search, Depth-First Search +1· 10 companies
842. Split Array into Fibonacci SequenceVideo
Solution40.3%Medium
Backtracking, String· 2 companies
845. Longest Mountain in ArrayVideo
Solution42.6%Medium
Array, Dynamic Programming +2· 10 companies
846. Hand of StraightsVideo
Solution58.5%Medium
Array, Greedy +2· 6 companies
848. Shifting LettersVideo
Solution46.1%Medium
Array, Prefix Sum +1· 3 companies
849. Maximize Distance to Closest PersonVideo
Solution49.7%Medium
Array· 8 companies
851. Loud and RichVideo
Solution63.9%Medium
Array, Depth-First Search +2· 6 companies
852. Peak Index in a Mountain ArrayVideo
Solution66.9%Medium
Array, Binary Search· 10 companies
853. Car FleetVideo
Solution55.5%Medium
Array, Monotonic Stack +2· 11 companies
855. Exam RoomVideo
Solution43.6%Medium
Design, Heap (Priority Queue) +1· 6 companies
856. Score of ParenthesesVideo
Solution66.0%Medium
Stack, String· 5 companies
858. Mirror ReflectionVideo
Solution62.3%Medium
Geometry, Math +1· 3 companies
861. Score After Flipping MatrixVideo
Solution80.3%Medium
Array, Bit Manipulation +2· 3 companies
863. All Nodes Distance K in Binary TreeVideo
Solution68.1%Medium
Binary Tree, Breadth-First Search +3· 16 companies
865. Smallest Subtree with all the Deepest NodesVideo
Solution77.5%Medium
Binary Tree, Breadth-First Search +3· 4 companies
866. Prime PalindromeVideo
Solution28.6%Medium
Math, Number Theory· 3 companies
869. Reordered Power of 2Video
Solution66.0%Medium
Counting, Enumeration +3· 5 companies
870. Advantage ShuffleVideo
Solution55.0%Medium
Array, Greedy +2· 3 companies
873. Length of Longest Fibonacci SubsequenceVideo
Solution57.5%Medium
Array, Dynamic Programming +1· 7 companies
874. Walking Robot SimulationVideo
Solution64.5%Medium
Array, Hash Table +1· 7 companies
875. Koko Eating BananasVideo
Solution50.4%Medium
Array, Binary Search· 47 companies
877. Stone GameVideo
Solution77.0%Medium
Array, Dynamic Programming +2· 4 companies
880. Decoded String at IndexVideo
Solution37.3%Medium
Stack, String· 5 companies
881. Boats to Save PeopleVideo
Solution62.7%Medium
Array, Greedy +2· 11 companies
885. Spiral Matrix IIIVideo
Solution84.6%Medium
Array, Matrix +1· 8 companies
886. Possible BipartitionVideo
Solution53.0%Medium
Breadth-First Search, Depth-First Search +2· 11 companies
889. Construct Binary Tree from Preorder and Postorder TraversalVideo
Solution78.0%Medium
Array, Binary Tree +3· 6 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
894. All Possible Full Binary TreesVideo
Solution82.8%Medium
Binary Tree, Dynamic Programming +3· 5 companies
898. Bitwise ORs of SubarraysVideo
Solution56.8%Medium
Array, Bit Manipulation +1· 7 companies
Showing 451–500 of 2,133