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Problem Library

Master these coding challenges to ace your next technical interview. Handpicked problems with personalized spaced repetition.

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Showing 26-50 of 104 matching problems.

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StatusTitleDifficulty
53. Maximum SubarrayOpen sourceMedium
54. Spiral MatrixOpen sourceMedium
55. Jump GameOpen sourceMedium
56. Merge IntervalsOpen sourceMedium
57. Insert IntervalOpen sourceMedium
59. Spiral Matrix IIOpen sourceMedium
63. Unique Paths IIOpen sourceMedium
64. Minimum Path SumOpen sourceMedium
66. Plus OneOpen sourceEasy
68. Text JustificationOpen sourceHard
73. Set Matrix ZeroesOpen sourceMedium
74. Search a 2D MatrixOpen sourceMedium
75. Sort ColorsOpen sourceMedium
78. SubsetsOpen sourceMedium
79. Word SearchOpen sourceMedium
80. Remove Duplicates from Sorted Array IIOpen sourceMedium
81. Search in Rotated Sorted Array IIOpen sourceMedium
84. Largest Rectangle in HistogramOpen sourceHard
85. Maximal RectangleOpen sourceHard
88. Merge Sorted ArrayOpen sourceEasy
90. Subsets IIOpen sourceMedium
105. Construct Binary Tree from Preorder and Inorder TraversalOpen sourceMedium
106. Construct Binary Tree from Inorder and Postorder TraversalOpen sourceMedium
108. Convert Sorted Array to Binary Search TreeOpen sourceEasy
118. Pascal's TriangleOpen sourceEasy