| Problem Name | Online Judge | Year | Contest | Difficulty Level | |
|---|---|---|---|---|---|
| 1 | Asteroids | PKU | 1 | ||
| 2 | The Great Wall Game | Live Archive | 2005 | World Finals - Shanghai | 1 |
| 3 | Antenna Placement | PKU | 2 | ||
| 4 | Selfish Cities | SPOJ | 2 | ||
| 5 | Baby | SPOJ | 2 | ||
| 6 | Beloved Sons | SGU | 3 | ||
| 7 | Crime Wave - The Sequel | UVA | 3 | ||
| 8 | Jogging Trails | UVA | 3 | ||
| 9 | Golden Tiger Claw | UVA | 4 | ||
| 10 | Warehouse | UVA | 4 | ||
| 11 | 30 Minutes or Less | UVA | 6 | ||
| 12 | Gödel's Dream | UVA | 7 | ||
| 13 | Deciphering | Codeforces | Testing Round #11 | 9 |