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	16	8	50%	6.6Hard	en
Cudoviste	0.00	75	3521	3393	96%	1.5Easy	en
Kletva	0.01	492	91	72	79%	6.3Hard	en
Program	0.15	330	365	133	36%	7.8Hard	en
Sok	0.00	73	1882	1768	94%	1.7Easy	en
Zuma	0.00	272	71	41	58%	7.4Hard	en