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

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Name	Fastest	Shortest	Authors	Full Solves	Ratio	Difficulty	Languages
Blokovi	0.02	100	30	17	57%	6.9Hard	en
DNA	0.00	53	369	289	78%	4.5Medium	en
Eko	0.04	86	431	346	80%	3.4Medium	en
Križaljka	0.00	100	1204	1140	95%	1.7Easy	en
Popločavanje	0.06	853	60	41	68%	6.2Hard	en
Razbibriga	0.01	242	106	85	80%	6.0Hard	en