Problems from CTU Open 2009

	Add	Remove

Name	Fastest	Shortest	Authors	Full Solves	Ratio	Difficulty	Languages
Arable Area	0.03	1029	98	53	54%	8.4Hard	en
Digital display	0.00	220	1146	1025	89%	2.6Easy	en
Peculiar primes	0.01	259	345	263	76%	5.5Hard	en