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Problems

2,133 problems

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

Medium · 2,133 results

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TitleSolutionAcceptDifficultyTopics
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
524. Longest Word in Dictionary through DeletingVideo
Solution53.2%Medium
Array, Sorting +2· 2 companies
525. Contiguous ArrayVideo
Solution52.2%Medium
Array, Hash Table +1· 16 companies
526. Beautiful ArrangementVideo
Solution64.9%Medium
Array, Backtracking +3· 6 companies
528. Random Pick with WeightVideo
Solution49.0%Medium
Array, Binary Search +3· 26 companies
529. MinesweeperVideo
Solution68.7%Medium
Array, Breadth-First Search +2· 9 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
534. Game Play Analysis IIIVideoPremium
Solution81.0%Medium
Database· 1 company
535. Encode and Decode TinyURLVideo
Solution86.5%Medium
Design, Hash Function +2· 9 companies
536. Construct Binary Tree from StringVideoPremium
Solution58.7%Medium
Binary Tree, Depth-First Search +3· 3 companies
537. Complex Number MultiplicationVideo
Solution73.9%Medium
Math, Simulation +1· 3 companies
538. Convert BST to Greater TreeVideo
Solution72.1%Medium
Binary Search Tree, Binary Tree +2· 4 companies
539. Minimum Time DifferenceVideo
Solution62.7%Medium
Array, Math +2· 9 companies
540. Single Element in a Sorted ArrayVideo
Solution59.3%Medium
Array, Binary Search· 19 companies
542. 01 MatrixVideo
Solution54.7%Medium
Array, Breadth-First Search +2· 14 companies
544. Output Contest MatchesVideoPremium
Solution77.3%Medium
Recursion, Simulation +1· 1 company
545. Boundary of Binary TreeVideoPremium
Solution48.0%Medium
Binary Tree, Depth-First Search +1· 10 companies
547. Number of ProvincesVideo
Solution70.8%Medium
Breadth-First Search, Depth-First Search +2· 9 companies
549. Binary Tree Longest Consecutive Sequence IIVideoPremium
Solution50.1%Medium
Binary Tree, Depth-First Search +1· 3 companies
550. Game Play Analysis IVVideo
Solution42.8%Medium
Database· 6 companies
553. Optimal DivisionVideo
Solution64.0%Medium
Array, Dynamic Programming +1· 1 company
554. Brick WallVideo
Solution56.1%Medium
Array, Hash Table· 5 companies
555. Split Concatenated StringsVideoPremium
Solution43.4%Medium
Array, Greedy +1· 1 company
556. Next Greater Element IIIVideo
Solution35.2%Medium
Math, String +1· 11 companies
558. Logical OR of Two Binary Grids Represented as Quad-TreesVideo
Solution53.9%Medium
Divide and Conquer, Tree
560. Subarray Sum Equals KVideo
Solution48.2%Medium
Array, Hash Table +1· 47 companies
562. Longest Line of Consecutive One in MatrixVideoPremium
Solution50.5%Medium
Array, Dynamic Programming +1· 1 company
565. Array NestingVideo
Solution56.6%Medium
Array, Depth-First Search· 3 companies
567. Permutation in StringVideo
Solution49.8%Medium
Hash Table, Sliding Window +2· 16 companies
570. Managers with at Least 5 Direct ReportsVideo
Solution49.4%Medium
Database· 8 companies
573. Squirrel SimulationVideoPremium
Solution57.1%Medium
Array, Math· 1 company
574. Winning CandidateVideoPremium
Solution62.8%Medium
Database
576. Out of Boundary PathsVideo
Solution48.1%Medium
Dynamic Programming· 3 companies
578. Get Highest Answer Rate QuestionVideoPremium
Solution40.2%Medium
Database· 1 company
580. Count Student Number in DepartmentsVideoPremium
Solution60.1%Medium
Database· 1 company
581. Shortest Unsorted Continuous SubarrayVideo
Solution38.7%Medium
Array, Greedy +4· 9 companies
582. Kill ProcessVideoPremium
Solution70.4%Medium
Array, Breadth-First Search +3· 4 companies
583. Delete Operation for Two StringsVideo
Solution66.0%Medium
Dynamic Programming, String· 4 companies
585. Investments in 2016Video
Solution52.1%Medium
Database· 6 companies
592. Fraction Addition and SubtractionVideo
Solution66.6%Medium
Math, Simulation +1· 5 companies
593. Valid SquareVideo
Solution45.5%Medium
Geometry, Math· 3 companies
602. Friend Requests II: Who Has the Most FriendsVideo
Solution64.0%Medium
Database· 5 companies
606. Construct String from Binary TreeVideo
Solution70.6%Medium
Binary Tree, Depth-First Search +2· 3 companies
608. Tree NodeVideo
Solution76.7%Medium
Database· 4 companies
609. Find Duplicate File in SystemVideo
Solution67.6%Medium
Array, Hash Table +1· 7 companies
611. Valid Triangle NumberVideo
Solution56.8%Medium
Array, Binary Search +3· 9 companies
612. Shortest Distance in a PlaneVideoPremium
Solution61.3%Medium
Database· 1 company
Showing 301–350 of 2,133