Problems from Central Europe Regional Contest (CERC) 2013

Name
Fastest
Shortest
Total
Acc.
Ratio
Difficulty
Languages
Bus0.0056482355655%1.8Easyen
Captain Obvious and the Rabbit-Man0.412511023736%6.5Harden
Chain & Co.0.221544831822%7.0Harden
Crane0.0258526312046%5.5Harden
Digraphs0.0010673587521%6.4Harden
Draughts0.0156467626539%3.5Mediumen
Escape0.3310014727917%8.7Harden
Magical GCD0.2612898829129%5.6Harden
Rubik's Rectangle0.211858902123%8.2Harden
Subway0.4218001231915%8.1Harden
What does the fox say?0.007011645519745%1.9Easyen