Problems from Croatian Open Competition in Informatics 2009/2010, contest #4

	Add	Remove

Name	Fastest	Shortest	Total	Acc.	Ratio	Difficulty	Languages
Autori	0.00	5	61404	33229	54%	1.2Easy	en
Iks	0.00	296	855	404	47%	2.9Medium	en
Kaboom	0.01	5	85	22	26%	7.1Hard	en
Ograda	0.03	986	214	67	31%	6.3Hard	en
Palačinke	0.05	1766	90	11	12%	7.8Hard	en
Planina	0.00	5	25269	15121	60%	1.4Easy	en