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| ID | Nazwa | Znaczniki | Zgłosiło | %Rozwiązało | Średnio |
|---|---|---|---|---|---|
| car | Carrots for Rabbits | 8 | 100% | 100 | |
| car | Carcassonne [B] | pa r5 b 2017 | 6 | 33% | 46 |
| carp | Carpet | 8 | 87% | 87 | |
| car | Car Park | ceoi 2018 d0 | 43 | 69% | 76 |
| cat | Cat Exercise | 8 | 100% | 100 | |
| cat | Catshock | 0 | |||
| cat | Catshock | 8 | 87% | 87 | |
| cat | cat | 1 | 0% | 0 | |
| cbur | Bursztyn | 37 | 70% | 84 | |
| cbur | Bursztyn | 5 | 80% | 95 | |
| C | Cenowe Combo | segtree sweep amppz Bardzo trudne | 12 | 25% | 40 |
| cgc | D. CGCDSSQ / Codeforces | 22 | 63% | 72 | |
| chess | chess | 0 | |||
| chess | chess | 0 | |||
| chick | chick | 2 | 100% | 100 | |
| cho | Chochliki | 3 | 0% | 0 | |
| cho | Chochliki | 1 | 0% | 0 | |
| cho | cho | 32 | 93% | 93 | |
| cho | 5. Choinka | 69 | 97% | 97 | |
| cho | Choinka | 51 | 5% | 5 |