Problems from Central Europe Regional Contest (CERC) 2013

Name
Fastest
Shortest
Total
Acc.
Ratio
Difficulty
Languages
Bus0.0056150336555%1.7Easyen
Captain Obvious and the Rabbit-Man0.42251913336%6.1Harden
Chain & Co.0.221544771722%7.1Harden
Crane0.0275224811546%4.9Mediumen
Digraphs0.0010673337121%6.5Harden
Draughts0.0156463124639%3.6Mediumen
Escape0.3310014166816%8.4Harden
Magical GCD0.2612894027629%5.6Harden
Rubik's Rectangle0.271858831923%7.5Harden
Subway0.4227091141715%8.4Harden
What does the fox say?0.007010820481745%1.9Easyen