GitHub - Arya-Gupta/LeetCode: C++ solutions for LeetCode problems along with explanation

This repository contains C++ solutions for LeetCode problems along with problem link, difficulty and tags. Each solution is accompanied with its time complexity, space complexity and explanation.

https://codeforces.com/blog/entry/21344

LeetCode Patterns

Name		Name	Last commit message	Last commit date
Latest commit History 358 Commits
1. Two Sum		1. Two Sum
100. Same Tree		100. Same Tree
1002. Find Common Characters		1002. Find Common Characters
1008. Construct Binary Search Tree from Preorder Traversal		1008. Construct Binary Search Tree from Preorder Traversal
101. Symmetric Tree		101. Symmetric Tree
102. Binary Tree Level Order Traversal		102. Binary Tree Level Order Traversal
103. Binary Tree Zigzag Level Order Traversal		103. Binary Tree Zigzag Level Order Traversal
104. Maximum Depth of Binary Tree		104. Maximum Depth of Binary Tree
1041. Robot Bounded In Circle		1041. Robot Bounded In Circle
108. Convert Sorted Array to Binary Search Tree		108. Convert Sorted Array to Binary Search Tree
110. Balanced Binary Tree		110. Balanced Binary Tree
114. Flatten Binary Tree to Linked List		114. Flatten Binary Tree to Linked List
116. Populating Next Right Pointers in Each Node		116. Populating Next Right Pointers in Each Node
118. Pascal's Triangle		118. Pascal's Triangle
125. Valid Palindrome		125. Valid Palindrome
128. Longest Consecutive Sequence		128. Longest Consecutive Sequence
13. Roman to Integer		13. Roman to Integer
1302. Deepest Leaves Sum		1302. Deepest Leaves Sum
1346. Check If N and Its Double Exist		1346. Check If N and Its Double Exist
14. Longest Common Prefix		14. Longest Common Prefix
141. Linked List Cycle		141. Linked List Cycle
142. Linked List Cycle II		142. Linked List Cycle II
144. Binary Tree Preorder Traversal		144. Binary Tree Preorder Traversal
145. Binary Tree Postorder Traversal		145. Binary Tree Postorder Traversal
146. LRU Cache		146. LRU Cache
15. 3Sum		10000 15. 3Sum
153. Find Minimum in Rotated Sorted Array		153. Find Minimum in Rotated Sorted Array
18. 4Sum		18. 4Sum
1876. Substrings of Size Three with Distinct Characters		1876. Substrings of Size Three with Distinct Characters
1880. Check if Word Equals Summation of Two Words		1880. Check if Word Equals Summation of Two Words
19. Remove Nth Node From End of List		19. Remove Nth Node From End of List
191. Number of 1 Bits		191. Number of 1 Bits
199. Binary Tree Right Side View		199. Binary Tree Right Side View
2. Add Two Numbers		2. Add Two Numbers
20. Valid Parentheses		20. Valid Parentheses
200. Number of Islands		200. Number of Islands
2006. Count Number of Pairs With Absolute Difference K		2006. Count Number of Pairs With Absolute Difference K
2023. Number of Pairs of Strings With Concatenation Equal to Target		2023. Number of Pairs of Strings With Concatenation Equal to Target
205. Isomorphic Strings		205. Isomorphic Strings
206. Reverse Linked List		206. Reverse Linked List
217. Contains Duplicate		217. Contains Duplicate
2181. Merge Nodes in Between Zeros		2181. Merge Nodes in Between Zeros
219. Contains Duplicate II		219. Contains Duplicate II
2236. Root Equals Sum of Children		2236. Root Equals Sum of Children
226. Invert Binary Tree		226. Invert Binary Tree
2269. Find the K-Beauty of a Number		2269. Find the K-Beauty of a Number
23. Merge k Sorted Lists		23. Merge k Sorted Lists
230. Kth Smallest Element in a BST		230. Kth Smallest Element in a BST
231. Power of Two		231. Power of Two
232. Implement Queue using Stacks		232. Implement Queue using Stacks
234. Palindrome Linked List		234. Palindrome Linked List
235. Lowest Common Ancestor of a Binary Search Tree		235. Lowest Common Ancestor of a Binary Search Tree
236. Lowest Common Ancestor of a Binary Tree		236. Lowest Common Ancestor of a Binary Tree
239. Sliding Window Maximum		239. Sliding Window Maximum
240. Search a 2D Matrix II		240. Search a 2D Matrix II
242. Valid Anagram		242. Valid Anagram
25. Reverse Nodes in k-Group		25. Reverse Nodes in k-Group
257. Binary Tree Paths		257. Binary Tree Paths
26. Remove Duplicates from Sorted Array		26. Remove Duplicates from Sorted Array
268. Missing Number		268. Missing Number
287. Find the Duplicate Number		287. Find the Duplicate Number
3. Longest Substring Without Repeating Characters		3. Longest Substring Without Repeating Characters
31. Next Permutation		31. Next Permutation
33. Search in Rotated Sorted Array		33. Search in Rotated Sorted Array
34. Find First and Last Position of Element in Sorted Array		34. Find First and Last Position of Element in Sorted Array
344. Reverse String		344. Reverse String
350. Intersection of Two Arrays II		350. Intersection of Two Arrays II
383. Ransom Note		383. Ransom Note
387. First Unique Character in a String		387. First Unique Character in a String
41. First Missing Positive		41. First Missing Positive
42. Trapping Rain Water		42. Trapping Rain Water
450. Delete Node in a BST		450. Delete Node in a BST
477. Total Hamming Distance		477. Total Hamming Distance
485. Max Consecutive Ones		485. Max Consecutive Ones
513. Find Bottom Left Tree Value		513. Find Bottom Left Tree Value
515. Find Largest Value in Each Tree Row		515. Find Largest Value in Each Tree Row
523. Continuous Subarray Sum		523. Continuous Subarray Sum
53. Maximum Subarray		53. Maximum Subarray
54. Spiral Matrix		54. Spiral Matrix
540. Single Element in a Sorted Array		540. Single Element in a Sorted Array
543. Diameter of Binary Tree		543. Diameter of Binary Tree
547. Number of Provinces		547. Number of Provinces
56. Merge Intervals		56. Merge Intervals
61. Rotate List		61. Rotate List
643. Maximum Average Subarray I		643. Maximum Average Subarray I
680. Valid Palindrome II		680. Valid Palindrome II
703. Kth Largest Element in a Stream		703. Kth Largest Element in a Stream
704. Binary Search		704. Binary Search
733. Flood Fill		733. Flood Fill
74. Search a 2D Matrix		74. Search a 2D Matrix
75. Sort Colors		75. Sort Colors
767. Reorganize String		767. Reorganize String
779. K-th Symbol in Grammar		779. K-th Symbol in Grammar
784. Letter Case Permutation		784. Letter Case Permutation
811. Subdomain Visit Count		811. Subdomain Visit Count
83. Remove Duplicates from Sorted List		83. Remove Duplicates from Sorted List
876. Middle of the Linked List		876. Middle of the Linked List
88. Merge Sorted Array		88. Merge Sorted Array
890. Find and Replace Pattern		890. Find and Replace Pattern
904. Fruit Into Baskets		904. Fruit Into Baskets

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