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	31519	30189	96%	1.3Easy	en
Iks	0.00	296	358	328	92%	3.0Medium	en
Kaboom	0.01	192	27	16	59%	6.8Hard	en
Ograda	0.03	986	57	41	72%	6.7Hard	en
Palačinke	0.05	1766	17	9	53%	7.4Hard	en
Planina	0.00	6	14423	13920	97%	1.4Easy	en