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	9746	1889	19%	6.0Hard	en
Cross	0.00	1041	1117	344	31%	4.2Medium	en
Kemija	0.00	5	8894	5453	61%	1.6Easy	en
Matrica	0.01	1210	86	22	26%	6.8Hard	en
Najkraci	0.34	1006	143	52	36%	7.1Hard	en
Pet	0.00	5	31143	17510	56%	1.3Easy	en