Problems from Waterloo Programming Contest 2004-09-25

	Add	Remove

Name	Fastest	Shortest	Total	Acc.	Ratio	Difficulty	Languages
Antiarithmetic?	0.01	326	2983	545	18%	7.1Hard	en
Help!	0.00	371	4484	661	15%	5.8Hard	en
Test	0.00	880	398	155	39%	4.5Medium	en
Treequivalence	0.01	1399	128	24	19%	8.3Hard	en