Algorithms and Data Structures
Video walkthroughs of classic algorithm and data-structure problems, explained step by step in Python.
Video Lessons
1. Two Sum - Leetcode 1 - Python
2. Longest Substring Without Repeating Characters - Leetcode 3 - Python
3. Longest Palindromic Substring - Leetcode 5 - Python
4. Container With Most Water - Leetcode 11 - Python
5. Triplet Sum - Leetcode 15 - Python
6. Remove Nth Node From End of List - Leetcode 19 - Python
7. Valid Parentheses - Leetcode 20 - Python
8. Merge Two Sorted Lists - Leetcode 21 - Python
9. Merge k Sorted Lists - Leetcode 23 - Python
10. Search in Rotated Sorted Array - Leetcode 33 - Python
11. Combination Sum - Leetcode 39 - Python
12. Rotate Image - Leetcode 48 - Python
13. Group Anagrams - Leetcode 49 - Python
14. Maximum Subarray - Leetcode 53 - Python
15. Spiral Matrix - Leetcode 54 - Python
16. Jump Game - Leetcode 55 - Python
17. Merge Intervals - Leetcode 56 - Python
18. Insert Interval - Leetcode 57 - Python
19. Unique Paths - Leetcode 62 - Python
20. Climbing Stairs - Leetcode 70 - Python
21. Set Matrix Zeroes - Leetcode 73 - Python
22. Minimum Window Substring - Leetcode 76 - Python
23. Word Search - Leetcode 79 - Python
24. Decode Ways - Leetcode 91 - Python
25. Validate Binary Search Tree - Leetcode 98 - Python
26. Same Tree - Leetcode 100 - Python
27. Binary Tree Level Order Traversal - Leetcode 102 - Python
28. Maximum Depth of Binary Tree - Leetcode 104 - Python
29. Construct Binary Tree from Preorder and Inorder Traversal - Leetcode 105 - Python
30. Best Time to Buy and Sell - Leetcode 121 - Python
31. Binary Tree Maximum Path Sum - Leetcode 124 - Python
32. Valid Palindrome - Leetcode 125 - Python
33. Longest Consecutive Sequence - Leetcode 128 - Python
34. Clone Graph - Leetcode 133 - Python
35. Word Break - Leetcode 139 - Python
36. Linked List Cycle - Leetcode 141 - Python
37. Reorder List - Leetcode 143 - Python
38. Maximum Product Subarray - Leetcode 152 - Python
39. Find Minimum in Rotated Sorted Array - Leetcode 153 - Python
40. Reverse Bits - Leetcode 190 - Python
41. Number of 1 Bits - Leetcode 191 - Python
42. House Robber - Leetcode 198 - Python
43. Number of Islands - Leetcode 200 - Python
44. Reverse Linked List - Leetcode 206 - Python
45. Course Schedule - Leetcode 207 - Python
46. Implement Trie (Prefix Tree) - Leetcode 208 - Python
47. Course Schedule II - Leetcode 210 - Python
48. Design Add and Search Words Data Structure - Leetcode 211 - Python
49. Word Search II - Leetcode 212 - Python
50. House Robber II - Leetcode 213 - Python
51. Contains Duplicate - Leetcode 217 - Python
52. Invert Binary Tree - Leetcode 226 - Python
53. Kth Smallest Element in a BST - Leetcode 230 - Python
54. Lowest Common Ancestor of a Binary Search Tree - Leetcode 235 - Python
55. Product of Array Except Self - Leetcode 238 - Python
56. Valid Anagram - Leetcode 242 - Python
57. Missing Number - Leetcode 268 - Python
58. Find Median from Data Stream - Leetcode 295 - Python
59. Serialize and Deserialize Binary Tree - Leetcode 297 - Python
60. Longest Increasing Subsequence - Leetcode 300 - Python
61. Coin Change - Leetcode 322 - Python
62. Counting Bits - Leetcode 338 - Python
63. Top K Frequent Elements - Leetcode 347 - Python
64. Sum of Two Integers - Leetcode 371 - Python
65. Pacific Atlantic Water Flow - Leetcode 417 - Python
66. Longest Repeating Character Replacement - Leetcode 424 - Python
67. Non-overlapping Intervals - Leetcode 435 - Python
68. Subtree of Another Tree - Leetcode 572 - Python
69. Can Place Flowers - Leetcode 605 - Python
70. Maximum Length Of Pair Chain - Leetcode 646 - Python
71. Palindromic Substrings - Leetcode 647 - Python
72. Shortest Path Visiting All Nodes - Leetcode 847 - Python
73. Maximize Distance to Closest Person - Leetcode 849 - Python
74. Partition Array for Maximum Sum - Leetcode 1043 - Python
75. Longest Common Subsequence - Leetcode 1143 - Python
