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

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Name	Fastest	Shortest	Total	Acc.	Ratio	Difficulty	Languages
Blokovi	0.02	100	95	22	23%	6.8Hard	en
DNA	0.00	53	1039	402	39%	4.5Medium	en
Eko	0.04	86	1620	484	30%	3.5Medium	en
Križaljka	0.00	100	2293	1233	54%	1.7Easy	en
Popločavanje	0.06	853	398	89	22%	6.3Hard	en
Razbibriga	0.01	242	269	112	42%	6.1Hard	en