Problems from Southwestern Europe Regional Contest (SWERC) 2011

Submissions Users
Name   Total Acc. Ratio Fastest Total Acc. Ratio Difficulty
Distributing Ballot Boxes 5086 1323 26% 0.04 951 797 84% 4.6
Guess the Numbers 427 89 21% 0.01 115 61 53% 8.5
Non-negative Partial Sums 220 69 31% 0.04 67 51 76% 4.9
Remoteland 84 32 38% 0.18 26 21 81% 5.8