| ID | Name | Tags | Submitters | % Correct | Average |
|---|---|---|---|---|---|
| rbst | Red and Blue Spanning Tree | 6 | 100% | 100 | |
| rca | Rewolucja Ciapongowa 1 | 244 | 91% | 94 | |
| rea | Zadanie Reakcje chemiczne | oig 2 e1 | 141 | 62% | 74 |
| rea | Reakcje chemiczne | 6 | 50% | 80 | |
| red | Redukcja połączeń | oi 32 e3 d2 | 43 | 34% | 58 |
| ref | Reforma drogowa | oig e3 d2 18 | 114 | 85% | 92 |
| reg | Regał | Very easy | 43 | 86% | 95 |
| reg | Task Regions | ioi 2009 d2 | 12 | 50% | 92 |
| reg | Task Regions | 4 | 25% | 73 | |
| rek | Reklama | twoptrs | 320 | 81% | 87 |
| rek | Rekurencja | 38 | 47% | 58 | |
| rek | Task Recursive Ant | oi 4 e2 d2 | 20 | 60% | 71 |
| rek | Task Recursive Ant | 31 | 70% | 84 | |
| rek | Magiczny Sklep | 25 | 96% | 96 | |
| rekpion | Reklama pionowa | 2 | 50% | 85 | |
| rem | Removing Digits | 29 | 96% | 96 | |
| rem | Remont | oi 26 e3 d1 | 340 | 64% | 74 |
| ren | Zadanie Renowacja dróg [A] | pa 2012 r4 a | 8 | 75% | 76 |
| rep | Reprezentacje różnicowe | oi 24 e1 | 159 | 82% | 88 |
| rep | Reprezentanci firmy | oi ioi-elem d1 27 | 102 | 94% | 95 |