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	9559	1865	20%	6.3Hard	en
Cross	0.00	1041	1111	343	31%	4.1Medium	en
Kemija	0.00	5	8864	5436	61%	1.7Easy	en
Matrica	0.01	1210	82	22	27%	6.8Hard	en
Najkraci	0.34	1006	139	52	37%	7.1Hard	en
Pet	0.00	5	30998	17445	56%	1.3Easy	en