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163 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 · 163 results

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TitleSolutionAcceptDifficultyTopics

36. Valid SudokuVideo

Solution64.9%Medium

Array, Hash Table +1· 26 companies

48. Rotate ImageVideo

Solution80.7%Medium

Array, Math +1· 36 companies

54. Spiral MatrixVideo

Solution58.2%Medium

Array, Matrix +1· 49 companies

59. Spiral Matrix IIVideo

Solution76.0%Medium

Array, Matrix +1· 11 companies

63. Unique Paths IIVideo

Solution44.9%Medium

Array, Dynamic Programming +1· 9 companies

64. Minimum Path SumVideo

Solution68.6%Medium

Array, Dynamic Programming +1· 17 companies

73. Set Matrix ZeroesVideo

Solution63.8%Medium

Array, Hash Table +1· 22 companies

74. Search a 2D MatrixVideo

Solution54.4%Medium

Array, Binary Search +1· 19 companies

79. Word SearchVideo

Solution48.2%Medium

Array, Backtracking +2· 36 companies

130. Surrounded RegionsVideo

Solution46.1%Medium

Array, Breadth-First Search +3· 12 companies

200. Number of IslandsVideo

Solution65.2%Medium

Array, Breadth-First Search +3· 86 companies

221. Maximal SquareVideo

Solution50.7%Medium

Array, Dynamic Programming +1· 28 companies

240. Search a 2D Matrix IIVideo

Solution58.2%Medium

Array, Binary Search +2· 16 companies

286. Walls and GatesVideoPremium

Solution63.9%Medium

Array, Breadth-First Search +1· 11 companies

289. Game of LifeVideo

Solution73.0%Medium

Array, Matrix +1· 15 companies

304. Range Sum Query 2D - ImmutableVideo

Solution59.2%Medium

Array, Design +2· 10 companies

308. Range Sum Query 2D - MutableVideoPremium

Solution46.0%Medium

Array, Binary Indexed Tree +3· 3 companies

311. Sparse Matrix MultiplicationVideoPremium

Solution69.3%Medium

Array, Hash Table +1· 9 companies

348. Design Tic-Tac-ToeVideoPremium

Solution58.8%Medium

Array, Design +3· 13 companies

361. Bomb EnemyVideoPremium

Solution52.8%Medium

Array, Dynamic Programming +1· 2 companies

378. Kth Smallest Element in a Sorted MatrixVideo

Solution65.1%Medium

Array, Binary Search +3· 10 companies

417. Pacific Atlantic Water FlowVideo

Solution61.3%Medium

Array, Breadth-First Search +2· 11 companies

419. Battleships in a BoardVideo

Solution77.4%Medium

Array, Depth-First Search +1· 8 companies

427. Construct Quad TreeVideo

Solution78.8%Medium

Array, Divide and Conquer +2· 8 companies

490. The MazeVideoPremium

Solution60.4%Medium

Array, Breadth-First Search +2· 13 companies

498. Diagonal TraverseVideo

Solution67.1%Medium

Array, Matrix +1· 12 companies

505. The Maze IIVideoPremium

Solution55.0%Medium

Array, Breadth-First Search +5· 5 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

533. Lonely Pixel IIVideoPremium

Solution48.7%Medium

Array, Hash Table +1· 1 company

542. 01 MatrixVideo

Solution54.7%Medium

Array, Breadth-First Search +2· 14 companies

562. Longest Line of Consecutive One in MatrixVideoPremium

Solution50.5%Medium

Array, Dynamic Programming +1· 1 company

695. Max Area of IslandVideo

Solution73.9%Medium

Array, Breadth-First Search +3· 20 companies

723. Candy CrushVideoPremium

Solution77.6%Medium

Array, Matrix +2· 11 companies

750. Number Of Corner RectanglesVideoPremium

Solution67.8%Medium

Array, Dynamic Programming +2· 1 company

794. Valid Tic-Tac-Toe StateVideo

Solution34.7%Medium

Array, Matrix· 3 companies

807. Max Increase to Keep City SkylineVideo

Solution86.2%Medium

Array, Greedy +1· 3 companies

835. Image OverlapVideo

Solution70.6%Medium

Array, Matrix· 1 company

840. Magic Squares In GridVideo

Solution55.1%Medium

Array, Hash Table +2· 5 companies

861. Score After Flipping MatrixVideo

Solution80.3%Medium

Array, Bit Manipulation +2· 3 companies

885. Spiral Matrix IIIVideo

Solution84.6%Medium

Array, Matrix +1· 8 companies

909. Snakes and LaddersVideo

Solution48.0%Medium

Array, Breadth-First Search +1· 12 companies

931. Minimum Falling Path SumVideo

Solution60.8%Medium

Array, Dynamic Programming +1· 8 companies

934. Shortest BridgeVideo

Solution59.9%Medium

Array, Breadth-First Search +2· 16 companies

959. Regions Cut By SlashesVideo

Solution77.8%Medium

Array, Breadth-First Search +4· 6 companies

994. Rotting OrangesVideo

Solution59.5%Medium

Array, Breadth-First Search +1· 52 companies

1020. Number of EnclavesVideo

Solution72.2%Medium

Array, Breadth-First Search +3· 5 companies

1034. Coloring A BorderVideo

Solution51.8%Medium

Array, Breadth-First Search +2· 3 companies

1072. Flip Columns For Maximum Number of Equal RowsVideo

Solution78.5%Medium

Array, Hash Table +1· 4 companies

1091. Shortest Path in Binary MatrixVideo

Solution51.8%Medium

Array, Breadth-First Search +1· 15 companies

Showing 1–50 of 163