Problems from Croatian Open Competition in Informatics 2008/2009, contest #4

	Add	Remove

Name	Fastest	Shortest	Total	Acc.	Ratio	Difficulty	Languages
Datum	0.00	5	9835	5776	59%	1.6Easy	en
Mjehuric	0.00	69	8134	4302	53%	1.7Easy	en
Periodni	0.00	1656	68	27	40%	6.3Hard	en
Rot	0.00	340	495	199	40%	3.1Medium	en
Slikar	0.01	1082	153	72	47%	4.6Medium	en
Trezor	0.00	990	83	25	30%	5.7Hard	en