Problems from Northwestern Europe Regional Contest (NWERC) 2011

Submissions Users
Name   Total Acc. Ratio Fastest Total Acc. Ratio Difficulty
Movie collection 1088 398 37% 0.02 355 245 69% 5.6
Piece It Together 111 30 27% 0.00 32 18 56% 7.5
Please, Go First 67 38 57% 0.00 33 28 85% 4.4
Train Delays 13 6 46% 0.02 6 5 83% 5.9