| Id | Questions | Difficulty |
|---|---|---|
| 1 | Parenthesis Checker | Easy |
| 2 | Infix to Postfix | Easy |
| 3 | Restrictive Candy Crush | Easy |
| 4 | Next Larger Element | Medium |
| 5 | Stock Span problem | Medium |
| 6 | The Celebrity Problem | Medium |
| 7 | Maximum Rectangular Area in a Histogram | Medium |
| 8 | Longest Valid Parentheses | Hard |
| 9 | Maximum of minimum for every window size | Hard |
| 10 | Remove K digits | Hard |
| 11 | 132 Geeky Buildings | Hard |