Problems from Waterloo Programming Contest 2004-09-25

Submissions Users
Name   Total Acc. Ratio Fastest Total Acc. Ratio Difficulty
Antiarithmetic? 1538 279 18% 0.01 346 199 58% 7.2
Help! 1766 318 18% 0.00 243 175 72% 6.5
Test 82 42 51% 0.01 26 22 85% 5.7
Treequivalence 55 19 35% 0.00 22 18 82% 6.2