Problems from Northwestern Europe Regional Contest (NWERC) 2011

Submissions Users
Name   Total Acc. Ratio Fastest Total Acc. Ratio Difficulty
Movie collection 1302 464 36% 0.02 421 294 70% 5.6
Piece It Together 144 31 22% 0.00 39 19 49% 8.4
Please, Go First 70 42 60% 0.00 36 31 86% 4.2
Train Delays 13 6 46% 0.01 6 5 83% 5.9