Problems from Waterloo Programming Contest 2009-02-08

Submissions Users
Name   Total Acc. Ratio Fastest Total Acc. Ratio Difficulty
Colliding Traffic 752 108 14% 0.01 96 70 73% 6.6
Ocean Currents 876 313 36% 0.17 242 210 87% 4.7
Scrolling Sign 956 453 47% 0.00 463 408 88% 2.9
Unique Snowflakes 3582 1014 28% 0.02 793 649 82% 4.2
Zerg Rush!!! 107 13 12% 0.28 18 11 61% 7.6