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Problems

4,005 problems

Has videoPremium onlyReset
Array2,209String870Hash Table786Math682Dynamic Programming666Sorting504Greedy480Binary Search352Depth-First Search335Database303Bit Manipulation283Matrix278Tree261Breadth-First Search255Two Pointers249All topics

With video · 4,005 results

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TitleSolutionAcceptDifficultyTopics
51. N-QueensVideo
Solution76.3%Hard
Array, Backtracking· 16 companies
52. N-Queens IIVideo
Solution79.5%Hard
Backtracking· 10 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
58. Length of Last WordVideo
Solution59.7%Easy
String· 7 companies
59. Spiral Matrix IIVideo
Solution76.0%Medium
Array, Matrix +1· 11 companies
60. Permutation SequenceVideo
Solution54.3%Hard
Math, Recursion· 7 companies
61. Rotate ListVideo
Solution43.1%Medium
Linked List, Two Pointers· 9 companies
62. Unique PathsVideo
Solution67.3%Medium
Combinatorics, Dynamic Programming +1· 21 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
65. Valid NumberVideo
Solution23.3%Hard
String· 7 companies
66. Plus OneVideo
Solution50.3%Easy
Array, Math· 13 companies
67. Add BinaryVideo
Solution58.4%Easy
Bit Manipulation, Math +2· 17 companies
68. Text JustificationVideo
Solution52.4%Hard
Array, Simulation +1· 44 companies
69. Sqrt(x)Video
Solution42.2%Easy
Binary Search, Math· 17 companies
70. Climbing StairsVideo
Solution54.0%Easy
Dynamic Programming, Math +1· 37 companies
71. Simplify PathVideo
Solution51.4%Medium
Stack, String· 24 companies
72. Edit DistanceVideo
Solution61.5%Medium
Dynamic Programming, String· 24 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
76. Minimum Window SubstringVideo
Solution48.3%Hard
Hash Table, Sliding Window +1· 35 companies
77. CombinationsVideo
Solution74.9%Medium
Backtracking· 8 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
82. Remove Duplicates from Sorted List IIVideo
Solution52.8%Medium
Linked List, Two Pointers· 11 companies
83. Remove Duplicates from Sorted ListVideo
Solution57.6%Easy
Linked List· 9 companies
84. Largest Rectangle in HistogramVideo
Solution50.7%Hard
Array, Monotonic Stack +1· 30 companies
85. Maximal RectangleVideo
Solution60.1%Hard
Array, Dynamic Programming +3· 15 companies
86. Partition ListVideo
Solution62.0%Medium
Linked List, Two Pointers· 5 companies
87. Scramble StringVideo
Solution45.9%Hard
Dynamic Programming, String· 6 companies
88. Merge Sorted ArrayVideo
Solution55.7%Easy
Array, Sorting +1· 37 companies
89. Gray CodeVideo
Solution66.2%Medium
Backtracking, Bit Manipulation +1· 5 companies
90. Subsets IIVideo
Solution61.7%Medium
Array, Backtracking +1· 9 companies
91. Decode WaysVideo
Solution38.3%Medium
Dynamic Programming, String· 22 companies
92. Reverse Linked List IIVideo
Solution52.4%Medium
Linked List· 16 companies
93. Restore IP AddressesVideo
Solution57.3%Medium
Backtracking, String· 20 companies
94. Binary Tree Inorder TraversalVideo
Solution80.4%Easy
Binary Tree, Depth-First Search +2· 7 companies
95. Unique Binary Search Trees IIVideo
Solution63.3%Medium
Backtracking, Binary Search Tree +3· 5 companies
96. Unique Binary Search TreesVideo
Solution64.0%Medium
Binary Search Tree, Binary Tree +3· 10 companies
97. Interleaving StringVideo
Solution45.0%Medium
Dynamic Programming, String· 10 companies
98. Validate Binary Search TreeVideo
Solution36.1%Medium
Binary Search Tree, Binary Tree +2· 18 companies
99. Recover Binary Search TreeVideo
Solution60.9%Medium
Binary Search Tree, Binary Tree +2· 8 companies
100. Same TreeVideo
Solution68.0%Easy
Binary Tree, Breadth-First Search +2· 9 companies
Showing 51–100 of 4,005