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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 · 473 results

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TitleSolutionAcceptDifficultyTopics

508. Most Frequent Subtree SumVideo

Solution69.6%Medium

Binary Tree, Depth-First Search +2· 3 companies

519. Random Flip MatrixVideo

Solution46.9%Medium

Hash Table, Math +2· 1 company

522. Longest Uncommon Subsequence IIVideo

Solution45.8%Medium

Array, Hash Table +3· 1 company

523. Continuous Subarray SumVideo

Solution31.3%Medium

Array, Hash Table +2· 9 companies

525. Contiguous ArrayVideo

Solution52.2%Medium

Array, Hash Table +1· 16 companies

531. Lonely Pixel IVideoPremium

Solution62.3%Medium

Array, Hash Table +1· 1 company

532. K-diff Pairs in an ArrayVideo

Solution46.3%Medium

Array, Binary Search +3· 8 companies

533. Lonely Pixel IIVideoPremium

Solution48.7%Medium

Array, Hash Table +1· 1 company

535. Encode and Decode TinyURLVideo

Solution86.5%Medium

Design, Hash Function +2· 9 companies

554. Brick WallVideo

Solution56.1%Medium

Array, Hash Table· 5 companies

560. Subarray Sum Equals KVideo

Solution48.2%Medium

Array, Hash Table +1· 47 companies

567. Permutation in StringVideo

Solution49.8%Medium

Hash Table, Sliding Window +2· 16 companies

582. Kill ProcessVideoPremium

Solution70.4%Medium

Array, Breadth-First Search +3· 4 companies

609. Find Duplicate File in SystemVideo

Solution67.6%Medium

Array, Hash Table +1· 7 companies

616. Add Bold Tag in StringVideoPremium

Solution51.4%Medium

Array, Hash Table +3· 4 companies

621. Task SchedulerVideo

Solution64.0%Medium

Array, Counting +4· 24 companies

635. Design Log Storage SystemVideoPremium

Solution59.8%Medium

Design, Hash Table +2· 4 companies

648. Replace WordsVideo

Solution68.7%Medium

Array, Hash Table +2· 4 companies

652. Find Duplicate SubtreesVideo

Solution60.6%Medium

Binary Tree, Depth-First Search +2· 8 companies

659. Split Array into Consecutive SubsequencesVideo

Solution52.7%Medium

Array, Greedy +2· 2 companies

666. Path Sum IVVideoPremium

Solution62.5%Medium

Array, Binary Tree +3· 1 company

676. Implement Magic DictionaryVideo

Solution57.8%Medium

Depth-First Search, Design +3· 2 companies

677. Map Sum PairsVideo

Solution57.4%Medium

Design, Hash Table +2· 3 companies

681. Next Closest TimeVideoPremium

Solution46.8%Medium

Backtracking, Enumeration +2· 1 company

690. Employee ImportanceVideo

Solution69.4%Medium

Array, Breadth-First Search +3· 6 companies

692. Top K Frequent WordsVideo

Solution60.6%Medium

Bucket Sort, Counting +5· 23 companies

694. Number of Distinct IslandsVideoPremium

Solution62.8%Medium

Breadth-First Search, Depth-First Search +3· 12 companies

720. Longest Word in DictionaryVideo

Solution55.2%Medium

Array, Hash Table +3· 3 companies

721. Accounts MergeVideo

Solution62.2%Medium

Array, Breadth-First Search +5· 17 companies

737. Sentence Similarity IIVideoPremium

Solution51.2%Medium

Array, Breadth-First Search +4· 4 companies

740. Delete and EarnVideo

Solution57.7%Medium

Array, Dynamic Programming +1· 12 companies

752. Open the LockVideo

Solution61.2%Medium

Array, Breadth-First Search +2· 15 companies

758. Bold Words in StringVideoPremium

Solution53.2%Medium

Array, Hash Table +3· 1 company

763. Partition LabelsVideo

Solution81.8%Medium

Greedy, Hash Table +2· 9 companies

767. Reorganize StringVideo

Solution57.5%Medium

Counting, Greedy +4· 20 companies

781. Rabbits in ForestVideo

Solution58.0%Medium

Array, Greedy +2· 8 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

811. Subdomain Visit CountVideo

Solution77.2%Medium

Array, Counting +2· 4 companies

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

833. Find And Replace in StringVideo

Solution50.9%Medium

Array, Hash Table +2· 2 companies

840. Magic Squares In GridVideo

Solution55.1%Medium

Array, Hash Table +2· 5 companies

846. Hand of StraightsVideo

Solution58.5%Medium

Array, Greedy +2· 6 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

869. Reordered Power of 2Video

Solution66.0%Medium

Counting, Enumeration +3· 5 companies

873. Length of Longest Fibonacci SubsequenceVideo

Solution57.5%Medium

Array, Dynamic Programming +1· 7 companies

Showing 51–100 of 473