| Problem Name | Online Judge | Year | Contest | Difficulty Level | |
|---|---|---|---|---|---|
| 1 | A Bug’s Life | SPOJ | 1 | ||
| 2 | Piece it together | Live Archive | 2011 | Europe - Northwestern | 2 |
| 3 | Idol | Live Archive | 2012 | Europe - Northwestern | 3 |
| 4 | Manhattan | UVA | 3 | ||
| 5 | Wedding | UVA | 4 | ||
| 6 | Two Sets | Codeforces | Codeforces Round #268 (Div. 1) & Codeforces Round #268 (Div. 2) | 4 | |
| 7 | TORNJEVI | SPOJ | 4 | ||
| 8 | The Door Problem | Codeforces | ICM Technex 2017 and Codeforces Round #400 (Div. 1 + Div. 2, combined) | 4 | |
| 9 | Cardápio da Sra Montagny | SPOJ Brazil | 5 | ||
| 10 | Cutting Figure | Codeforces | Codeforces Round #122 (Div. 1) & Codeforces Round #122 (Div. 2) | 5 | |
| 11 | The Ministers' Major Mess | UVA | 6 | ||
| 12 | The Road to Berland is Paved With Good Intentions | Codeforces | Codeforces Round #141 (Div. 2) | 6 | |
| 13 | Ring Road 2 | Codeforces | Codeforces Beta Round #27 (Codeforces format, Div. 2) | 6 | |
| 14 | Football and Lie | Timus | 7 | ||
| 15 | Rectangles | UVA | 7 | ||
| 16 | Game with Cards | Timus | 7 | ||
| 17 | New Language | Codeforces | Codeforces Round #315 (Div. 1) & Codeforces Round #315 (Div. 2) | 8 | |
| 18 | Palindromic DNA | UVA | 9 | ||
| 19 | Duff in Mafia | Codeforces | Codeforces Round #326 (Div. 1) & Codeforces Round #326 (Div. 2) | 10 | |
| 20 | Summer Dichotomy | Codeforces | Codeforces Round #300 | 10 | |
| 21 | Supplying the Suppliers | SPOJ | 10 |