| ID | Name | Tags | Submitters | % Correct | Average |
|---|---|---|---|---|---|
| kin | Zadanie Kinoman | oi 22 e1 | 489 | 69% | 78 |
| klo | Klocki | oi 14 e3 d2 | 119 | 64% | 69 |
| klo | Task Bricks | oi 21 e1 | 104 | 33% | 63 |
| klo | Task Building blocks | oi 15 e1 | 154 | 61% | 67 |
| klo | Task Blocks | oi 17 e2 d1 | 281 | 60% | 74 |
| klu | Klubowicze 2 | oi 26 e1 | 256 | 64% | 71 |
| klu | Klubowicze | oi 23 e3 d2 | 116 | 38% | 52 |
| kod | Task Code | oi 7 e2 d2 | 58 | 89% | 93 |
| kod | Task Coding of Permutations | oi 2 e3 d0 | 222 | 75% | 85 |
| kod | Task The Code | oi 16 e3 d2 | 6 | 33% | 58 |
| kol | Kolej | oi 17 e1 | 232 | 19% | 25 |
| kol | Kolorowy wąż | oi 30 e1 | 182 | 71% | 75 |
| kol | Task Railway | oi 14 e3 d0 | 21 | 33% | 51 |
| kol | Kolacje | oi 26 e2 d1 | 407 | 38% | 65 |
| kol | Kolekcjoner Bajtemonów | oi 22 e3 d2 | 302 | 85% | 91 |
| kol | Kolekcjoner Bajtemonów 2 | oi d0 e3 28 | 93 | 56% | 74 |
| kol | Task Railways | oi 9 e1 | 756 | 79% | 89 |
| kom | Task Byteasar the Travelling Salesman | oi 9 e1 | 677 | 86% | 92 |
| kom | Komunikacja międzyplanetarna | oi d2 e3 28 | 72 | 9% | 14 |
| kom | Kompresja drzew binarnych | oi ioi-elem d2 27 | 30 | 33% | 41 |