LeetCode-Problem-Solution

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**This is a(n):** - [ ] New solution - [x] Update to an existing solution - [ ] Error **Details:** The current implementation of the singleNumber function uses a map...

harshendram

I propose updating the implementation to use the XOR bitwise operation, which provides a more efficient solution. The XOR approach has a time complexity of O(n) but reduces the space...

harshendram

Add solution to leetcode problem 2641. Cousins in Binary Tree II

1

**This is a(n):** - [ x] New solution - [ ] Update to an existing solution - [ ] Error **Details:** I wish to add the solution to the leetcode...

simran0963

Add solution to leetcode problem 2641. Cousins in Binary Tree II

3

- [ x] I have read [CONTRIBUTING.md](https://github.com/md-shamim-ahmad/LeetCode-Problem-Solution/blob/main/Contribution%20Guidelines/How%20to%20Add%20a%20new%20Solution%20Code.md). - [x ] This pull request is all my own work -- I have not plagiarized it. - [ x] All functions and...

simran0963

- [X] I have read [CONTRIBUTING.md](https://github.com/md-shamim-ahmad/LeetCode-Problem-Solution/blob/main/Contribution%20Guidelines/How%20to%20Add%20a%20new%20Solution%20Code.md). - [X] This pull request is all my own work -- I have not plagiarized it. - [X] All functions and variable names follow...

bastenahamad