Problems from Waterloo Programming Contest 2004-09-25

	Add	Remove

Name	Fastest	Shortest	Authors	Full Solves	Ratio	Difficulty	Languages
Antiarithmetic?	0.01	218	720	448	62%	6.5Hard	en
Help!	0.00	371	606	436	72%	5.3Medium	en
Test	0.00	880	206	160	78%	4.0Medium	en
Treequivalence	0.01	961	46	25	54%	7.9Hard	en