Problems from Central Europe Regional Contest (CERC) 2013

Name
Fastest
Shortest
Total
Acc.
Ratio
Difficulty
Languages
Bus0.0056708367955%1.7Easyen
Captain Obvious and the Rabbit-Man0.412511353828%6.9Harden
Chain & Co.0.2215441272217%7.1Harden
Crane0.0258529612342%5.6Harden
Digraphs0.0010673917820%6.4Harden
Draughts0.0156471527639%3.5Mediumen
Escape0.3310015208216%8.4Harden
Magical GCD0.26128102830229%5.4Mediumen
Rubik's Rectangle0.2118581172118%8.2Harden
Subway0.4218001491913%8.2Harden
What does the fox say?0.007011875530445%2.0Easyen