Algorithm Problems

1. Two Sum
2. Longest Unique Substring
3. Top K frequent elements
4. LRU Cache
5. Rate Limiter
6. Merge Intervals
7. Insert Interval
8. Meeting Rooms II
9. Valid Parentheses
10. Min Stack
11. Binary Search
12. Product of Array Except Self
13. Kth Largest Element in an Array
14. Group Anagrams
15. Number of Islands
16. Reverse Linked List
17. Linked List Cycle
18. Merge Two Sorted Lists
19. Remove Nth Node From End of List
20. Stack Using Queues
21. Binary Tree Level Order Traversal
22. Maximum Depth of Binary Tree
23. Validate Binary Search Tree
24. Lowest Common Ancestor of a Binary Tree
25. Kth Smallest Element in a BST
26. Number of Connected Components in an Undirected Graph
27. Course Schedule
28. Coin Change (Minimum Coins)
29. Climbing Stairs
30. Search in Rotated Sorted Array
31. Find First and Last Position of Element in Sorted Array
32. Koko Eating Bananas
33. Merge K Sorted Lists
34. Find Median from Data Stream
35. Daily Temperatures
36. Next Greater Element
37. Largest Rectangle in Histogram
38. Single Number
39. Subsets
40. Permutations
41. Combination Sum

TODO

• Word Search
• Implement Trie
• House Robber
• Longest Increasing Subsequence
• Course Schedule II
• BFS Shortest Path in Grid
• Dijkstra's Algorithm
• Merge Sort
• Count Inversions
• Subarray Sum Equals K
• Jump Game
• Gas Station
• Binary Tree Right Side View
• Serialize and Deserialize Binary Tree
• Clone Graph
• Number of Provinces
• Word Ladder
• Network Delay Time
• 0/1 Knapsack

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• Implement Queue using Stacks
• Encode and Decode Strings
• Sliding Window Maximum
• Clone Graph

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Binary Search:

• First Occurrence ✅
• Last Occurrence ✅
• Lower Bound
• Upper Bound
• Search Insert Position
• Peak Element
• Rotated Sorted Array ✅
• Search on Answer (Binary Search on Answer) ✅