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	9921	1951	20%	5.1Medium	en
Cross	0.00	1041	1137	348	31%	4.2Medium	en
Kemija	0.00	5	8985	5507	61%	1.6Easy	en
Matrica	0.01	1210	95	22	23%	6.8Hard	en
Najkraci	0.34	1006	153	53	35%	6.8Hard	en
Pet	0.00	5	31377	17640	56%	1.3Easy	en