Problems from Croatian Open Competition in Informatics 2009/2010, contest #5

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Name	Fastest	Shortest	Authors	Full Solves	Ratio	Difficulty	Languages
Chuck	0.01	2060	17	9	53%	6.9Hard	en
Cudoviste	0.00	75	3541	3414	96%	1.4Easy	en
Kletva	0.01	492	92	73	79%	6.4Hard	en
Program	0.15	330	374	143	38%	7.6Hard	en
Sok	0.00	73	1895	1781	94%	1.7Easy	en
Zuma	0.00	272	85	55	65%	6.1Hard	en