LeetCode

LeetCode OJ

List

1. 1 Two Sum
2. 3 Longest Substring Without Repeating Characters
3. 15 3Sum
4. 18 4Sum
5. 19 Remove Nth Node From End of List
6. 25 Reverse Nodes in k-Group
7. 26 Remove Duplicates from Sorted Array
8. 29 Divide Two Integers
9. 34 Find First and Last Position of Element in Sorted Array
10. 46 Permutations
11. 51 N-Queens
12. 56 Merge Intervals
13. 65 Valid Number
14. 76 Minimum Window Substring
15. 83 Remove Duplicates from Sorted List
16. 92 Reverse Linked List II
17. 98 Validate Binary Search Tree
18. 105 Construct Binary Tree from Preorder and Inorder Traversal
19. 106 Construct Binary Tree from Inorder and Postorder Traversal
20. 111 Minimum Depth of Binary Tree
21. 114 Flatten Binary Tree to Linked List
22. 116 Populating Next Right Pointers in Each Node
23. 121 Best Time to Buy and Sell Stock
24. 122 Best Time to Buy and Sell Stock II
25. 123 Best Time to Buy and Sell Stock III
26. 130 Surrounded Regions
27. 141 Linked List Cycle
28. 142 Linked List Cycle II
29. 144 Binary Tree Preorder Traversal
30. 146 LRU Cache
31. 167 Two Sum II - Input array is sorted
32. 188 Best Time to Buy and Sell Stock IV
33. 198 House Robber
34. 213 House Robber II
35. 222 Count Complete Tree Nodes
36. 225 Implement Stack using Queues
37. 226 Invert Binary Tree
38. 230 Kth Smallest Element in a BST
39. 232 Implement Queue using Stacks
40. 234 Palindrome Linked List
41. 236 Lowest Common Ancestor of a Binary Tree
42. 239 Sliding Window Maximum
43. 295 Find Median from Data Stream
44. 297 Serialize and Deserialize Binary Tree
45. 309 Best Time to Buy and Sell Stock with Cooldown
46. 316 Remove Duplicate Letters
47. 322 Coin Change
48. 331 Verify Preorder Serialization of a Binary Tree
49. 337 House Robber III
50. 341 Flatten Nested List Iterator
51. 344 Reverse String
52. 355 Design Twitter
53. 380 Insert Delete GetRandom O(1)
54. 416 Partition Equal Subset Sum
55. 438 Find All Anagrams in a String
56. 450 Delete Node in a BST
57. 454 4Sum II
58. 460 LFU Cache
59. 496 Next Greater Element I
60. 503 Next Greater Element II
61. 509 Fibonacci Number
62. 538 Convert BST to Greater Tree
63. 567 Permutation in String
64. 652 Find Duplicate Subtrees
65. 654 Maximum Binary Tree
66. 700 Search in a Binary Search Tree
67. 701 Insert into a Binary Search Tree
68. 704 Binary Search
69. 710 Random Pick with Blacklist
70. 714 Best Time to Buy and Sell Stock with Transaction Fee
71. 739 Daily Temperatures
72. 752 Open the Lock
73. 875 Koko Eating Bananas
74. 986 Interval List Intersections
75. 990 Satisfiability of Equality Equations
76. 991 Broken Calculator
77. 1011 Capacity To Ship Packages Within D Days
78. 1038 Binary Search Tree to Greater Sum Tree
79. 1081 Smallest Subsequence of Distinct Characters
80. 1288 Remove Covered Intervals