| 408 | https://leetcode.com/problems/valid-word-abbreviation | Valid Word Abbreviation | Easy | 37.0% | 87.5% |
| 227 | https://leetcode.com/problems/basic-calculator-ii | Basic Calculator II | Medium | 46.6% | 100.0% |
| 224 | https://leetcode.com/problems/basic-calculator | Basic Calculator | Hard | 46.5% | 100.0% |
| 1472 | https://leetcode.com/problems/design-browser-history | Design Browser History | Medium | 78.2% | 62.5% |
| 10 | https://leetcode.com/problems/regular-expression-matching | Regular Expression Matching | Hard | 30.4% | 75.0% |
| 20 | https://leetcode.com/problems/valid-parentheses | Valid Parentheses | Easy | 43.7% | 75.0% |