Problems from Google Code Jam 2009 Qualification Round

Submissions Users
Name   Total Acc. Ratio Fastest Total Acc. Ratio Difficulty
Watersheds 127 72 57% 0.00 71 64 90% 3.5
Welcome to Code Jam (Easy) 1842 975 53% 0.00 812 749 92% 2.2
Welcome to Code Jam (Hard) 1255 533 42% 0.00 510 421 83% 4.4