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

	Add	Remove

Name	Fastest	Shortest	Total	Acc.	Ratio	Difficulty	Languages
Binary search tree	0.03	161	7827	1649	21%	7.4Hard	en
Cross	0.00	1041	995	319	32%	4.1Medium	en
Kemija	0.00	5	8461	5230	62%	1.8Easy	en
Matrica	0.01	1210	56	20	36%	6.9Hard	en
Najkraci	0.34	1006	118	52	44%	6.8Hard	en
Pet	0.00	5	27734	15876	57%	1.4Easy	en