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| ID | Nazwa | Znaczniki | Zgłosiło | %Rozwiązało | Średnio |
|---|---|---|---|---|---|
| cakes | Cakes | 24 | 25% | 77 | |
| cam | Camel | ejoi 2017 d2 | 24 | 45% | 47 |
| ccf | Candy Cane Feast / USACO Bronze | 6 | 83% | 94 | |
| cap | Wielkie i małe literki | 2 | 0% | 66 | |
| cap | CAPS LOCK | Łatwe | 159 | 48% | 56 |
| car | Carcassonne [B] | pa r5 b 2017 | 5 | 40% | 54 |
| carp | Carpet | 8 | 87% | 87 | |
| car | Car Park | ceoi 2018 d0 | 43 | 69% | 76 |
| cat | Cat Exercise | 7 | 100% | 100 | |
| cat | cat | 0 | |||
| cbur | Bursztyn | 25 | 72% | 81 | |
| C | Cenowe Combo | segtree sweep amppz Bardzo trudne | 7 | 42% | 50 |
| cho | Chochliki | 1 | 0% | 0 | |
| cho | 5. Choinka | 1 | 100% | 100 | |
| cho | Choinka | 36 | 5% | 5 | |
| cho | Chochliki | 3 | 0% | 0 | |
| cho | cho | 3 | 100% | 100 | |
| cho | Chochlik | pa final 2018 | 29 | 86% | 86 |
| lin | Chodzenie po linie [B] | pa b r5 2022 | 1 | 0% | 20 |
| a5g | Choina z cyferek | 833 | 96% | 97 |