| # | Title | Solutions | Category |
|---|---|---|---|
| 1837 | Maximum Sub Array | Solution | Easy |
| 114 | Binary Tree Preorder Traversal | Solution | Medium |
| 637 | Average of levels in Binary tree | Solution | Easy |
| 844 | Backspace String Compare | Solution | Easy |
| 704 | Binary Search | Solution | Easy |
| 701 | Insert into a Binary Search Tree | Solution | Medium |
| 1791 | Find Center of Star Graph | Solution | Medium |
| 24 | Swap nodes in Pair | Solution | Medium |
| 28 | Implement strStr() | Solution | Easy |
| 144 | Binary Tree Preorder Traversal | Solution | Easy |
| 62 | Unique Path | Solution | Medium |
| 392 | Is Subsequence | Solution | Easy |