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

	Add	Remove

Name	Fastest	Shortest	Authors	Full Solves	Ratio	Difficulty	Languages
Autori	0.00	6	31619	30287	96%	1.2Easy	en
Iks	0.00	296	361	330	91%	3.0Medium	en
Kaboom	0.01	192	28	17	61%	6.7Hard	en
Ograda	0.03	958	61	45	74%	6.5Hard	en
Palačinke	0.05	1766	18	10	56%	7.4Hard	en
Planina	0.00	6	14466	13964	97%	1.3Easy	en