| Problem Name | Online Judge | Year | Contest | Difficulty Level | |
|---|---|---|---|---|---|
| 1 | Topological Sorting | SPOJ | 1 | ||
| 2 | Project File Dependencies | SPOJ | 1 | ||
| 3 | Following Orders | UVA | 1 | ||
| 4 | The Dueling Philosophers Problem | Live Archive | 2012 | North America - Mid-Atlantic USA | 1 |
| 5 | Rare Order | UVA | 1 | ||
| 6 | Ordering Tasks | UVA | 1 | ||
| 7 | Beverages | UVA | 1 | ||
| 8 | Answer the boss! | SPOJ | 2 | ||
| 9 | Topological Sorting | Timus | 2 | ||
| 10 | All Discs Considered | SPOJ | 2 | ||
| 11 | Hierarchy | SPOJ | 2 | ||
| 12 | Indiana Jones and the lost Soccer Cup | SPOJ | 2 | ||
| 13 | Fox And Names | Codeforces | Codeforces Round #290 (Div. 2) & Codeforces Round #290 (Div. 1) | 2 | |
| 14 | Ordering | UVA | 2 | ||
| 15 | Rare Order | Live Archive | 1990 | World Finals - Washington | 2 |
| 16 | Pick up sticks | UVA | 2 | ||
| 17 | Orkut | SPOJ Brazil | 3 | ||
| 18 | Multinomial Coefficients | UVA | 4 | ||
| 19 | Tree Topology | SPOJ | 5 | ||
| 20 | Online Courses In BSU | Codeforces | VK Cup 2017 - Qualification 2 | 5 | |
| 21 | Escalonamento ótimo | SPOJ Brazil | 6 |