| LC index | problem | tag | difficulty | better solution | cpp | py |
|---|---|---|---|---|---|---|
| 1 | Two Sum | array | easy | √ | √ | |
| 4 | Median of Two Sorted Arrays | array | hard | √ | ||
| 24 | Swap Nodes in Pairs | linked | medium | √ | ||
| 15 | Three Sum | array | medium | √ | ||
| 100 | Same Tree | tree | easy | √ | ||
| 109 | Convert Sorted List to Binary Search Tree | medium | √ | |||
| 110 | Balanced Binary Tree | tree | easy | √ | ||
| 198 | House Robber I | array | easy | |||
| 322 | Coin Change | dp | medium | √ | ||
| 336 | Palindrome Pairs | string | hard | overtime | √ | |
| 337 | House Robber III | tree | medium | √ | √ | |
| 486 | Predict the Winner | √ | ||||
| 518 | Coin Change II | dp | medium | √ | √ | |
| 647 | Palindromic Substrings | string | medium | √ | ||
| 733 | Flood Fill | array | easy | √ |