| Problem Name | Online Judge | Contest | Difficulty Level | |
|---|---|---|---|---|
| 1 | Bitmap | SPOJ | 1 | |
| 2 | XOR Maximization | SPOJ | 1 | |
| 3 | Assignments | SPOJ | 1 | |
| 4 | Polo the Penguin and the XOR | CodeChef | 2 | |
| 5 | Fetching Cooking Tools | CodeChef | 3 | |
| 6 | A Simple Task | Codeforces | Codeforces Beta Round #11 | 5 |
| 7 | Game with Strings | Codeforces | Codeforces Round #275 (Div. 1) & Codeforces Round #275 (Div. 2) | 8 |
| 8 | Design Tutorial: Change the Goal | Codeforces | Codeforces Round #270 | 9 |