Problems from Croatian Open Competition in Informatics 2011/2012, contest #5

	Add	Remove

Name	Fastest	Shortest	Authors	Full Solves	Ratio	Difficulty	Languages
Blokovi	0.02	100	30	17	57%	6.5Hard	en
DNA	0.00	53	369	289	78%	4.6Medium	en
Eko	0.04	86	428	343	80%	3.4Medium	en
Križaljka	0.00	100	1205	1141	95%	1.7Easy	en
Popločavanje	0.06	853	59	40	68%	6.3Hard	en
Razbibriga	0.01	242	106	85	80%	5.9Hard	en