Problems from Central Europe Regional Contest (CERC) 2013

Name
Fastest
Shortest
Total
Acc.
Ratio
Difficulty
Languages
Bus0.0056241340755%1.8Easyen
Captain Obvious and the Rabbit-Man0.41251943436%6.6Harden
Chain & Co.0.221544881922%7.1Harden
Crane0.0275225011747%5.1Mediumen
Digraphs0.0010673337121%6.5Harden
Draughts0.0156464925639%3.5Mediumen
Escape0.3310014237117%8.3Harden
Magical GCD0.2612895128029%5.5Harden
Rubik's Rectangle0.271858831923%7.6Harden
Subway0.4227091141715%8.4Harden
What does the fox say?0.007011168496144%2.0Easyen