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| ID | Nazwa | Znaczniki | Zgłosiło | %Rozwiązało | Średnio |
|---|---|---|---|---|---|
| connect | connect | 1 | 100% | 100 | |
| cou | 1D Coulomb | 15 | 100% | 100 | |
| coh | Counting Haybales / USACO Silver | 75 | 92% | 93 | |
| cow1 | Czy Or jest większy 1 | 10 | 100% | 100 | |
| cbp | Cow Beauty Pageant (Silver Level) | 5 | 80% | 87 | |
| ccl | Cow College / USACO Bronze | 120 | 86% | 91 | |
| ct2 | Cowntact Tracing 2 / USACO Bronze | 9 | 44% | 58 | |
| ranom | C. Ranom Numbers | 4 | 100% | 100 | |
| rte | C. Remove the Ends / Codeforces | 10 | 90% | 93 | |
| ctb | Czy tu już byłem? | 0 | |||
| ctb | Czy tu już byłem? | 8 | 25% | 37 | |
| ctf | Closing the farm / USACO Silver | 0 | |||
| ctsd | Czy to samo drzewo? | 84 | 91% | 92 | |
| cuk | Cukierki | 14 | 100% | 100 | |
| cuk | Cukiernia | 17 | 88% | 88 | |
| cuk | Cukierki | oig e1 12 | 109 | 67% | 84 |
| cuk | Cukierki [C] | pa 2020 r5 c | 52 | 76% | 85 |
| cuk | Cukiernia | oi e1 28 | 384 | 46% | 54 |
| cuc | Custodial Cleanup - Zadanie z USACO GOLD 2022/23 | 9 | 77% | 81 | |
| cwi | 2. Ćwiartka | 59 | 94% | 96 |