Problems from Waterloo Programming Contest 2004-09-25

	Add	Remove

Name	Fastest	Shortest	Authors	Full Solves	Ratio	Difficulty	Languages
Antiarithmetic?	0.01	258	672	409	61%	6.8Hard	en
Help!	0.00	371	583	418	72%	5.6Hard	en
Test	0.00	880	197	152	77%	4.2Medium	en
Treequivalence	0.01	961	43	21	49%	8.8Hard	en