Problems from Google Code Jam 2010 Online Competition Africa

Submissions Users
Name   Total Acc. Ratio Fastest Total Acc. Ratio Difficulty
Get to Work 541 294 54% 0.00 269 249 93% 2.2
Odd Man Out 8849 5165 58% 0.00 4588 4358 95% 1.5
Polygraph 50 10 20% 0.01 12 10 83% 6.6
Qualification Round 52 20 38% 0.00 20 16 80% 6.0