Problems from CTU Open 2009

	Add	Remove

Name	Fastest	Shortest	Authors	Full Solves	Ratio	Difficulty	Languages
Arable Area	0.03	1029	103	59	57%	8.2Hard	en
Digital display	0.00	220	1157	1036	90%	2.6Easy	en
Peculiar primes	0.01	242	374	286	76%	5.2Medium	en