Problems from CTU Open 2009

	Add	Remove

Name	Fastest	Shortest	Total	Acc.	Ratio	Difficulty	Languages
Arable Area	0.03	1029	479	123	26%	8.6Hard	en
Digital display	0.00	220	3319	1120	34%	2.6Easy	en
Peculiar primes	0.01	339	1034	335	32%	6.1Hard	en