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

	Add	Remove

Name	Fastest	Shortest	Total	Acc.	Ratio	Difficulty	Languages
Binary search tree	0.01	161	10065	1991	20%	5.2Medium	en
Cross	0.00	1041	1157	354	31%	4.1Medium	en
Kemija	0.00	5	9018	5520	61%	1.6Easy	en
Matrica	0.01	1210	110	22	20%	6.9Hard	en
Najkraci	0.34	1006	177	53	30%	7.0Hard	en
Pet	0.00	5	31518	17714	56%	1.3Easy	en