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	3350	1135	34%	2.5Easy	en
Peculiar primes	0.01	339	1047	337	32%	5.8Hard	en