Problems from Central Europe Regional Contest (CERC) 2013

Name
Fastest
Shortest
Total
Acc.
Ratio
Difficulty
Languages
Bus0.0056220339455%1.8Easyen
Captain Obvious and the Rabbit-Man0.42251913336%6.1Harden
Chain & Co.0.221544881922%7.1Harden
Crane0.0275224911647%5.1Mediumen
Digraphs0.0010673337121%6.5Harden
Draughts0.0156463825039%3.6Mediumen
Escape0.3310014176816%8.6Harden
Magical GCD0.2612895128029%5.5Harden
Rubik's Rectangle0.271858831923%7.6Harden
Subway0.4227091141715%8.4Harden
What does the fox say?0.007011035489444%2.0Easyen