Problems from Northwestern Europe Regional Contest (NWERC) 2011

Submissions Users
Name   Total Acc. Ratio Fastest Total Acc. Ratio Difficulty
Movie Collection 3486 1307 37% 0.02 1126 830 74% 5.2
Piece It Together 493 105 21% 0.00 98 66 67% 5.9
Please, Go First 214 142 66% 0.00 128 115 90% 3.2
Train Delays 34 13 38% 0.01 12 10 83% 5.7