📝 Leetcode problems

• https://github.com/wisdompeak/LeetCode
• https://leetcode.com/discuss/general-discussion/419062/list-of-leetcode-question-to-cover-all-the-concepts-and-type-of-questions

BFS & DFS

• 37. Sudoku Solver
• 39. Combination Sum
• 40. Combination Sum II
• 51. N-Queens

• 52. N-Queens II

• Minesweeper
• Number of Islands
• Course Schedule

Binary Search

• 4. Median of Two Sorted Arrays
• 33. Search in Rotated Sorted Array
• 34. Find First and Last Position of Element in Sorted Array
• 35. Search Insert Position
• 69. Sqrt(x)

• 74. Search a 2D Matrix

• Binary Search

Bit manipulation

• 29. Divide Two Integers
• Single Number

Deque

• Sliding window maximum
• Constrained Subsequence Sum
• Longest Continuous Subarray With Absolute Diff…

Divide and Conquer

• https://www.geeksforgeeks.org/merge-sort/

• Count of Smaller Numbers After Self
• Count of Range Sum

DP

https://leetcode.com/discuss/study-guide/458695/Dynamic-Programming-Patterns

• 10. Regular Expression Matching
• 42. Trapping Rain Water
• 44. Wildcard Matching
• 53. Maximum Subarray
• 62. Unique Paths
• 63. Unique Paths II
• 64. Minimum Path Sum
• 70. Climbing Stairs

• 72. Edit Distance

• House Robber

• Word Break

Graph

• Path with Maximum Probability
• Network Delay Time

Greedy

• 45. Jump Game II

• 55. Jump Game

• Candy
• Gast Station

Hash

• 1. Two Sum

• 49. Group Anagrams

• Find All Anagrams in a String
• Contiguous Array

Heap / Priority Queue

• Sliding window median
• Find Median from Data Stream

Linked List

• 2. Add Two Numbers
• 19. Remove Nth Node From End of List
• 21. Merge Two Sorted Lists
• 23. Merge k Sorted Lists
• 24. Swap Nodes in Pairs
• 25. Reverse Nodes in k-Group

• 61. Rotate List

• Reverse linked list
• Reverse linked list II
• Remove Duplicates from Sorted List
• Remove Duplicates from Sorted List II
• Palindrome Linked List

Recursion

• 18. 4Sum
• 22. Generate Parentheses
• 46. Permutations
• 47. Permutations II
• 50. Pow(x, n)
• 67. Add Binary

Stack

• 20. Valid Parentheses
• 32. Longest Valid Parentheses

• 71. Simplify Path

• Basic Calculator
• Basic Calculator II

String

• 6. ZigZag Conversion
• 14. Longest Common Prefix
• 28. Implement strStr()
• 30. Substring with Concatenation of All Words
• 58. Length of Last Word

Tree

• Binary Tree Preorder Traversal
• Binary Tree Inorder Traversal

• Binary Tree Postorder Traversal

• Binary Tree Maximum Path Sum
• Print Binary Tree
• Balanced Binary Tree
• Invert Binary Tree

Trie

• Search Suggestion System
• Implement Trie (Prefix Tree)

Two Pointers & Sliding Window

• 3. Longest Substring Without Repeating Characters
• 5. Longest Palindromic Substring
• 11. Container With Most Water
• 15. 3 sum
• 16. 3Sum Closest

• 76. Minimum Window Substring

• Grumpy Bookstore Owner
• Number of Substrings Containing All Three Characters
• Count Number of Nice Subarrays
• Replace the Substring for Balanced String
• Max Consecutive Ones III
• Binary Subarrays With Sum
• Subarrays with K Different Integers
• Fruit Into Baskets
• Shortest Subarray with Sum at Least K
• Minimum Size Subarray Sum

Union Find

• TODO

Other

• 7. Reverse Integer
• 8. String to Integer (atoi)
• 9. Palindrome Number
• 12. Integer to Roman
• 13. Roman to Integer
• 17. Letter Combinations of a Phone Number
• 26. Remove Duplicates from Sorted Array
• 27. Remove Element
• 31. Next Permutation
• 36. Valid Sudoku
• 41. First Missing Positive
• 43. Multiply Strings
• 48. Rotate Image
• 54. Spiral Matrix
• 56. Merge Intervals
• 57. Insert Interval
• 59. Spiral Matrix II
• 60. Permutation Sequence
• 65. Valid Number
• 66. Plus One
• 68. Text Justification
• 73. Set Matrix Zeroes
• 75. Sort Colors