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	78	19	24%	7.1Hard	en
DNA	0.00	53	1021	397	39%	4.6Medium	en
Eko	0.04	86	1581	473	30%	3.5Medium	en
Križaljka	0.00	100	2239	1213	54%	1.8Easy	en
Popločavanje	0.11	853	380	86	23%	6.4Hard	en
Razbibriga	0.01	242	255	111	44%	6.1Hard	en