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

Name	Fastest	Shortest	Total	Acc.	Ratio	Difficulty	Languages
Binary search tree	0.03	306	6502	1491	23%	7.2Hard	en
Cross	0.00	1041	960	307	32%	4.2Medium	en
Kemija	0.00	13	8139	5038	62%	1.8Easy	en
Matrica	0.01	1210	55	20	36%	7.0Hard	en
Najkraci	0.34	1006	105	49	47%	6.9Hard	en
Pet	0.00	13	25841	14941	58%	1.4Easy	en