| 20 | https://leetcode.com/problems/valid-parentheses | Valid Parentheses | Easy | 43.7% | 75.0% |
| 2603 | https://leetcode.com/problems/collect-coins-in-a-tree | Collect Coins in a Tree | Hard | 39.6% | 100.0% |
| 1742 | https://leetcode.com/problems/maximum-number-of-balls-in-a-box | Maximum Number of Balls in a Box | Easy | 74.7% | 100.0% |
| 3 | https://leetcode.com/problems/longest-substring-without-repeating-characters | Longest Substring Without Repeating Characters | Medium | 38.5% | 62.5% |
| 155 | https://leetcode.com/problems/min-stack | Min Stack | Medium | 57.7% | 62.5% |
| 236 | https://leetcode.com/problems/lowest-common-ancestor-of-a-binary-tree | Lowest Common Ancestor of a Binary Tree | Medium | 68.7% | 62.5% |
| 200 | https://leetcode.com/problems/number-of-islands | Number of Islands | Medium | 63.8% | 75.0% |