| Problem Name | Online Judge | Year | Contest | Difficulty Level | |
|---|---|---|---|---|---|
| 1 | Build the Fence | SPOJ | 1 | ||
| 2 | Onion Layers | Live Archive | 2006 | Latin America - South America | 1 |
| 3 | Convex Hull of Lattice Points | Live Archive | 2009 | North America - Greater NY | 1 |
| 4 | SCUD Busters | UVA | 2 | ||
| 5 | Land Acquisition | SPOJ | 2 | ||
| 6 | Useless Tile Packers | UVA | 2 | ||
| 7 | Moth Eradication | UVA | 2 | ||
| 8 | Convex Hull Finding | UVA | 2 | ||
| 9 | The Fortified Forest | UVA | 3 | ||
| 10 | Doors and Penguins | SPOJ | 3 | ||
| 11 | Commando | SPOJ | 3 | ||
| 12 | Convex Hull | UVA | 3 | ||
| 13 | Military Story | SPOJ | 3 | ||
| 14 | Cops and Robbers | UVA | 4 | ||
| 15 | Good Inflation | SPOJ | 4 | ||
| 16 | Separate Points | SPOJ | 4 | ||
| 17 | Boundary Points | UVA | 5 | ||
| 18 | Perfume | SPOJ | 5 | ||
| 19 | Two Ball Game | SPOJ | 5 | ||
| 20 | Buy Low Sell High | Codeforces | MemSQL Start[c]UP 3.0 - Round 2 (onsite finalists) | 6 | |
| 21 | Counting Divisors | SPOJ | 9 | ||
| 22 | Amazing Factor Sequence (hard) | SPOJ | 10 |