Problems from Croatian Open Competition in Informatics 2008/2009, contest #3

	Add	Remove

Name	Fastest	Shortest	Total	Acc.	Ratio	Difficulty	Languages
Binary search tree	0.02	161	8823	1726	20%	7.1Hard	en
Cross	0.00	1041	1035	311	30%	4.1Medium	en
Kemija	0.00	5	8542	5236	61%	1.7Easy	en
Matrica	0.01	1210	68	20	29%	6.7Hard	en
Najkraci	0.34	1006	124	51	41%	7.0Hard	en
Pet	0.00	5	29712	16793	57%	1.4Easy	en