Problems from Central Europe Regional Contest (CERC) 2013

Name
Fastest
Shortest
Total
Acc.
Ratio
Difficulty
Languages
Bus0.0056712368255%1.7Easyen
Captain Obvious and the Rabbit-Man0.412511414129%6.0Harden
Chain & Co.0.2215441312217%7.5Harden
Crane0.0258530112441%5.5Harden
Digraphs0.0010673967920%6.6Harden
Draughts0.0156471927939%3.4Mediumen
Escape0.3310015318215%8.5Harden
Magical GCD0.26128103530429%5.4Mediumen
Rubik's Rectangle0.2118581202118%8.5Harden
Subway0.4218001612113%8.2Harden
What does the fox say?0.007011881530845%2.0Easyen