leetcode-common-questions

Python implementation of the problems from Clean Code Handbook - LeetCode 50 Common Interview Questions

Blocked means that the problem is available only with Leetcode Premium

Verified/not verified means that the problem solution was accepted/not tested by Leetcode

1. Two Sum
2. Two Sum II
3. Two Sum III (blocked/verified)
4. Valid Palindrome
5. Implement strstr()
6. Reverse Words in a String
7. Reverse Words in a String II
8. String to Integer (atoi)
9. Valid Number
10. Longest Substring Without Repeating Characters
11. Longest Substring with At Most Two Distinct Characters (blocked)
12. Missing Ranges (blocked/verified)
13. Longest Palindromic Substring
14. One Edit Distance (blocked/verified)
15. Read N Characters Given Read4 (blocked/not verified)
16. Read N Characters Given Read4 – Call multiple times (blocked/not verified)
17. Reverse Integer
18. Plus One
19. Palindrome Number
20. Merge Two Sorted Lists
21. Add Two Numbers
22. Swap Nodes in Pairs
23. Merge K Sorted Linked Lists
24. Copy List with Random Pointer
25. Validate Binary Search Tree
26. Maximum Depth of Binary Tree
27. Minimum Depth of Binary Tree
28. Balanced Binary Tree
29. Convert Sorted Array to Balanced Binary Search Tree
30. Convert Sorted List to Balanced Binary Search Tree
31. Binary Tree Maximum Path Sum
32. Binary Tree Upside Down (blocked/verified)
33. Single Number
34. Single Number II
35. Spiral Matrix
36. Integer to Roman
37. Roman to Integer
38. Clone Graph
39. Min Stack
40. Evaluate Reverse Polish Notation
41. Valid Parentheses
42. Climbing Stairs
43. Unique Paths
44. Unique Paths II
45. Maximum Sum Subarray
46. Maximum Product Subarray
47. Coins in a Line
48. Search Insert Position
49. Find Minimum in Sorted Rotated Array
50. Find Minimum in Rotated Sorted Array II – with duplicates