| Problem Name | Online Judge | Year | Contest | Difficulty Level | |
|---|---|---|---|---|---|
| 1 | Play on Words | SPOJ | 1 | ||
| 2 | The Necklace | UVA | 1 | ||
| 3 | The Postal Worker Rings Once | UVA | 1 | ||
| 4 | Play on Words | UVA | 2 | ||
| 5 | John's trip | UVA | 3 | ||
| 6 | Bus Routes | Timus | 3 | ||
| 7 | Snow Clearing | UVA | 3 | ||
| 8 | Catenyms | UVA | 4 | ||
| 9 | Weird journey | Codeforces | Codeforces Round #407 (Div. 1) & Codeforces Round #407 (Div. 2) | 5 | |
| 10 | Islands and Hotel Chains | SPOJ | 6 | ||
| 11 | John's trip | Live Archive | 1995 | Europe - Central | 6 |
| 12 | Tanya and Password | Codeforces | Codeforces Round #288 (Div. 2) | 6 | |
| 13 | One-Way Reform | Codeforces | Codeforces Round #375 (Div. 2) | 6 | |
| 14 | Traveling Graph | Codeforces | Codeforces Alpha Round #21 (Codeforces format) | 8 | |
| 15 | Dominoes | Codeforces | Codeforces Testing Round #5 | 8 |