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	30627	29360	96%	1.2Easy	en
Iks	0.00	296	347	319	92%	3.0Medium	en
Kaboom	0.01	192	28	16	57%	6.8Hard	en
Ograda	0.03	986	56	40	71%	6.9Hard	en
Palačinke	0.05	1766	17	8	47%	7.6Hard	en
Planina	0.00	6	14273	13773	96%	1.4Easy	en