| Problem Name | Online Judge | Difficulty Level | |
|---|---|---|---|
| 1 | Light Switching | SPOJ | 1 |
| 2 | Can you answer these queries I | SPOJ | 1 |
| 3 | Can you answer these queries II | SPOJ | 1 |
| 4 | Can you answer these queries III | SPOJ | 1 |
| 5 | Maximum Sum | SPOJ | 1 |
| 6 | Building Bridges(HARD) | SPOJ | 3 |
| 7 | Brackets | SPOJ | 3 |