Problems from Northwestern Europe Regional Contest (NWERC) 2011

Submissions Users
Name   Total Acc. Ratio Fastest Total Acc. Ratio Difficulty
Movie collection 787 276 35% 0.02 259 173 67% 5.8
Piece It Together 108 29 27% 0.00 30 17 57% 8.1
Please, Go First 59 34 58% 0.00 29 25 86% 4.4
Train Delays 11 5 45% 0.02 5 4 80% 5.9