Problems from Central Europe Regional Contest (CERC) 2013

Name
Fastest
Shortest
Total
Acc.
Ratio
Difficulty
Languages
Bus0.0056137337955%1.7Easyen
Captain Obvious and the Rabbit-Man0.53251783140%5.9Harden
Chain & Co.0.221544661726%7.1Harden
Crane0.0266422111351%4.2Mediumen
Digraphs0.0010673296921%6.7Harden
Draughts0.0176754820938%4.0Mediumen
Escape0.7210704006216%8.3Harden
Magical GCD0.2612893327129%5.8Harden
Rubik's Rectangle0.271858731926%7.5Harden
Subway0.5827091031616%8.5Harden
What does the fox say?0.007010763480445%2.2Easyen