Problems from CTU Open 2009

	Add	Remove

Name	Fastest	Shortest	Total	Acc.	Ratio	Difficulty	Languages
Arable Area	0.03	1029	531	126	24%	8.7Hard	en
Digital display	0.00	220	3450	1173	34%	2.7Easy	en
Peculiar primes	0.01	259	1101	368	33%	5.8Hard	en