Problems from Northwestern Europe Regional Contest (NWERC) 2011

Submissions Users
Name   Total Acc. Ratio Fastest Total Acc. Ratio Difficulty
Movie collection 646 219 34% 0.02 225 145 64% 5.9
Piece It Together 97 25 26% 0.00 25 14 56% 8.0
Please, Go First 55 30 55% 0.00 25 21 84% 4.7
Train Delays 7 3 43% 0.02 3 2 67% 6.2