Problems from Waterloo Programming Contest 2004-09-25

	Add	Remove

Name	Fastest	Shortest	Authors	Full Solves	Ratio	Difficulty	Languages
Antiarithmetic?	0.01	258	678	415	61%	6.7Hard	en
Help!	0.00	371	588	420	71%	5.6Hard	en
Test	0.00	880	206	160	78%	4.0Medium	en
Treequivalence	0.01	961	45	24	53%	8.0Hard	en