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	8202	1647	20%	7.3Hard	en
Cross	0.00	1041	956	298	31%	4.0Medium	en
Kemija	0.00	5	8380	5142	61%	1.7Easy	en
Matrica	0.01	1210	62	18	29%	6.9Hard	en
Najkraci	0.34	1006	123	51	41%	7.0Hard	en
Pet	0.00	5	27893	15910	57%	1.4Easy	en