Problems from Central Europe Regional Contest (CERC) 2013

Name
Fastest
Shortest
Total
Acc.
Ratio
Difficulty
Languages
Bus0.0056569358555%1.8Easyen
Captain Obvious and the Rabbit-Man0.412511073735%6.6Harden
Chain & Co.0.221544881820%7.0Harden
Crane0.0258526912045%5.6Harden
Digraphs0.0010673647521%6.4Harden
Draughts0.0156468226539%3.5Mediumen
Escape0.3310014938116%8.4Harden
Magical GCD0.26128100429730%5.5Harden
Rubik's Rectangle0.211858962122%8.3Harden
Subway0.4218001291915%8.2Harden
What does the fox say?0.007011737525845%1.8Easyen