Problems from CTU Open 2009

	Add	Remove

Name	Fastest	Shortest	Total	Acc.	Ratio	Difficulty	Languages
Arable Area	0.03	1029	539	126	23%	8.6Hard	en
Digital display	0.00	220	3505	1188	34%	2.7Easy	en
Peculiar primes	0.01	259	1106	373	34%	5.7Hard	en