Problems from Waterloo Programming Contest 2006-09-30

	Add	Remove

Name	Fastest	Shortest	Total	Acc.	Ratio	Difficulty	Languages
Life Forms	0.07	1156	1921	422	22%	7.0Hard	en
Rectilinear Polygon	0.01	603	201	71	35%	5.7Hard	en
Rinse	0.00	456	292	46	16%	8.5Hard	en
Semi-prime H-numbers	0.00	213	1360	459	34%	4.7Medium	en
Tautology	0.00	190	2424	1048	43%	2.5Easy	en