Code snippets from various on/offline programming contests and online judge systems.
| Source | Website URL | Description | # problems solved |
|---|---|---|---|
| AMPPZ | http://amppz.ii.uni.wroc.pl/ | Polish Collegiate Programming Contest (AMPPZ) | >10 |
| CodeForces | http://codeforces.com/ | Programming competitions and contests | <5 |
| MWPZ | http://mwpz.poznan.pl/ | Poznan Open Team Programming Championship | <5 |
| SPOJ | http://www.spoj.com | Problemset archive and online judge | <50 |