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	75	56	75%	6.2Hard	en
Jogurt	0.00	85	79	55	70%	7.0Hard	en
Prsteni	0.00	32	2832	2686	95%	1.6Easy	en
Sibice	0.00	50	14260	13655	96%	1.3Easy	en
Skener	0.00	42	5361	5137	96%	1.3Easy	en
Zbrka	0.01	154	216	172	80%	5.1Medium	en