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1,212 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 · 1,212 results

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TitleSolutionAcceptDifficultyTopics

11. Container With Most WaterVideo

Solution60.9%Medium

Array, Greedy +1· 57 companies

15. 3SumVideo

Solution40.1%Medium

Array, Sorting +1· 57 companies

16. 3Sum ClosestVideo

Solution47.4%Medium

Array, Sorting +1· 11 companies

18. 4SumVideo

Solution42.0%Medium

Array, Sorting +1· 20 companies

31. Next PermutationVideo

Solution46.1%Medium

Array, Two Pointers· 31 companies

33. Search in Rotated Sorted ArrayVideo

Solution45.5%Medium

Array, Binary Search· 53 companies

34. Find First and Last Position of Element in Sorted ArrayVideo

Solution49.7%Medium

Array, Binary Search· 29 companies

36. Valid SudokuVideo

Solution64.9%Medium

Array, Hash Table +1· 26 companies

39. Combination SumVideo

Solution76.9%Medium

Array, Backtracking· 26 companies

40. Combination Sum IIVideo

Solution60.3%Medium

Array, Backtracking· 15 companies

45. Jump Game IIVideo

Solution43.2%Medium

Array, Dynamic Programming +1· 26 companies

46. PermutationsVideo

Solution82.3%Medium

Array, Backtracking· 25 companies

47. Permutations IIVideo

Solution64.3%Medium

Array, Backtracking· 9 companies

48. Rotate ImageVideo

Solution80.7%Medium

Array, Math +1· 36 companies

49. Group AnagramsVideo

Solution73.0%Medium

Array, Hash Table +2· 87 companies

53. Maximum SubarrayVideo

Solution53.7%Medium

Array, Divide and Conquer +1· 64 companies

54. Spiral MatrixVideo

Solution58.2%Medium

Array, Matrix +1· 49 companies

55. Jump GameVideo

Solution41.2%Medium

Array, Dynamic Programming +1· 33 companies

56. Merge IntervalsVideo

Solution52.6%Medium

Array, Sorting· 112 companies

57. Insert IntervalVideo

Solution46.1%Medium

Array· 16 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

75. Sort ColorsVideo

Solution69.9%Medium

Array, Sorting +1· 37 companies

78. SubsetsVideo

Solution82.7%Medium

Array, Backtracking +1· 21 companies

79. Word SearchVideo

Solution48.2%Medium

Array, Backtracking +2· 36 companies

80. Remove Duplicates from Sorted Array IIVideo

Solution65.0%Medium

Array, Two Pointers· 9 companies

81. Search in Rotated Sorted Array IIVideo

Solution40.4%Medium

Array, Binary Search· 10 companies

90. Subsets IIVideo

Solution61.7%Medium

Array, Backtracking +1· 9 companies

105. Construct Binary Tree from Preorder and Inorder TraversalVideo

Solution69.7%Medium

Array, Binary Tree +3· 9 companies

106. Construct Binary Tree from Inorder and Postorder TraversalVideo

Solution69.4%Medium

Array, Binary Tree +3· 7 companies

120. TriangleVideo

Solution59.9%Medium

Array, Dynamic Programming· 11 companies

122. Best Time to Buy and Sell Stock IIVideo

Solution71.4%Medium

Array, Dynamic Programming +1· 28 companies

128. Longest Consecutive SequenceVideo

Solution47.0%Medium

Array, Hash Table +1· 40 companies

130. Surrounded RegionsVideo

Solution46.1%Medium

Array, Breadth-First Search +3· 12 companies

134. Gas StationVideo

Solution48.4%Medium

Array, Greedy· 29 companies

137. Single Number IIVideo

Solution68.0%Medium

Array, Bit Manipulation· 5 companies

139. Word BreakVideo

Solution49.8%Medium

Array, Dynamic Programming +4· 32 companies

150. Evaluate Reverse Polish NotationVideo

Solution58.5%Medium

Array, Math +1· 18 companies

152. Maximum Product SubarrayVideo

Solution36.7%Medium

Array, Dynamic Programming· 23 companies

153. Find Minimum in Rotated Sorted ArrayVideo

Solution55.3%Medium

Array, Binary Search· 18 companies

162. Find Peak ElementVideo

Solution46.8%Medium

Array, Binary Search· 30 companies

164. Maximum GapVideo

Solution53.4%Medium

Array, Bucket Sort +2· 7 companies

167. Two Sum II - Input Array Is SortedVideo

Solution65.5%Medium

Array, Binary Search +1· 16 companies

179. Largest NumberVideo

Solution43.9%Medium

Array, Greedy +2· 23 companies

189. Rotate ArrayVideo

Solution45.3%Medium

Array, Math +1· 27 companies

198. House RobberVideo

Solution53.6%Medium

Array, Dynamic Programming· 40 companies

200. Number of IslandsVideo

Solution65.2%Medium

Array, Breadth-First Search +3· 86 companies

Showing 1–50 of 1,212