Problems from CTU Open 2009

	Add	Remove

Name	Fastest	Shortest	Total	Acc.	Ratio	Difficulty	Languages
Arable Area	0.03	1029	490	126	26%	8.5Hard	en
Digital display	0.00	220	3355	1137	34%	2.5Easy	en
Peculiar primes	0.01	339	1048	338	32%	5.8Hard	en