Problems from Google Code Jam 2009 Qualification Round

Submissions Users
Name   Total Acc. Ratio Fastest Total Acc. Ratio Difficulty
Watersheds 179 96 54% 0.00 98 88 90% 3.7
Welcome to Code Jam (Easy) 2027 1066 53% 0.00 891 824 92% 2.2
Welcome to Code Jam (Hard) 1462 622 43% 0.00 576 478 83% 4.5