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	70	33	19	58%	6.9Hard	en
DNA	0.00	53	375	298	79%	4.2Medium	en
Eko	0.04	86	447	360	81%	3.2Medium	en
Križaljka	0.00	100	1223	1159	95%	1.7Easy	en
Popločavanje	0.06	853	67	47	70%	5.9Hard	en
Razbibriga	0.01	242	107	87	81%	5.6Hard	en