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| ID | Nazwa | Znaczniki | Zgłosiło | %Rozwiązało | Średnio |
|---|---|---|---|---|---|
| cam | Camel | ejoi 2017 d2 | 24 | 45% | 47 |
| ccf | Candy Cane Feast / USACO Bronze | 7 | 71% | 93 | |
| aa1 | C. Anya and 1100 | 6 | 100% | 100 | |
| cap | Wielkie i małe literki | 44 | 2% | 37 | |
| cap | CAPS LOCK | Łatwe | 188 | 46% | 55 |
| 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 | 1 | 0% | 0 | |
| cat | Cat Exercise | 8 | 100% | 100 | |
| cbur | Bursztyn | 4 | 75% | 94 | |
| cbur | Bursztyn | 37 | 70% | 84 | |
| C | Cenowe Combo | segtree sweep amppz Bardzo trudne | 11 | 27% | 42 |
| cgc | D. CGCDSSQ / Codeforces | 20 | 60% | 69 | |
| chess | chess | 0 | |||
| chess | chess | 0 | |||
| cho | Choinka | 46 | 4% | 4 | |
| cho | Chochliki | 3 | 0% | 0 | |
| cho | cho | 15 | 93% | 93 | |
| cho | 5. Choinka | 4 | 100% | 100 |