| Problem Name | Online Judge | Year | Contest | Difficulty Level | |
|---|---|---|---|---|---|
| 1 | Horrible Queries | SPOJ | 1 | ||
| 2 | K-th Number | SPOJ | 1 | ||
| 3 | Election Posters | SPOJ | 1 | ||
| 4 | Interval Product | Live Archive | 2012 | Latin America | 1 |
| 5 | Xenia and Bit Operations | Codeforces | Codeforces Round #197 (Div. 2) | 1 | |
| 6 | Maximum Sum | SPOJ | 1 | ||
| 7 | K-query | SPOJ | 1 | ||
| 8 | K-Query Online | SPOJ | 2 | ||
| 9 | K-query II | SPOJ | 3 |