Problems from Croatian Open Competition in Informatics 2006/2007, contest #4

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Name	Fastest	Shortest	Authors	Full Solves	Ratio	Difficulty	Languages
Ispiti	0.06	1400	77	57	74%	6.6Hard	en
Jogurt	0.00	85	83	59	71%	6.6Hard	en
Prsteni	0.00	32	2859	2713	95%	1.5Easy	en
Sibice	0.00	50	14321	13710	96%	1.3Easy	en
Skener	0.00	42	5433	5206	96%	1.3Easy	en
Zbrka	0.01	154	220	177	80%	4.9Medium	en