Problems from Waterloo Programming Contest 2009-02-08

Submissions Users
Name   Total Acc. Ratio Fastest Total Acc. Ratio Difficulty
Colliding Traffic 536 77 14% 0.01 57 49 86% 4.9
Ocean Currents 437 177 41% 0.17 136 119 88% 5.4
Scrolling Sign 609 280 46% 0.00 275 246 89% 3.0
Unique Snowflakes 2608 716 27% 0.02 516 419 81% 4.3
Zerg Rush!!! 103 12 12% 0.28 16 10 62% 7.6