Problems from International Collegiate Programming Contest (ACM-ICPC) Dress Rehearsal 2012

	Submissions				Users
Name	Total	Acc.	Ratio	Fastest	Total	Acc.	Ratio	Difficulty
Counting Stars	5785	1979	34%	0.00	1673	1453	87%	2.4
Heliocentric	2053	1164	57%	0.00	1057	991	94%	1.7
Limited Correspondence	784	174	22%	0.03	85	56	66%	7.0
Mandelbrot	2219	707	32%	0.00	677	593	88%	3.0
Matrix Inverse	2572	908	35%	0.00	899	747	83%	3.5
Polish Notation	994	296	30%	0.00	250	203	81%	3.2
Preludes	1652	891	54%	0.00	858	807	94%	1.8
Prime Spiral	578	224	39%	0.00	166	146	88%	3.7
Reversing Roads	1330	321	24%	0.00	288	233	81%	4.9
Sierpiński Circumference	2466	894	36%	0.00	805	712	88%	2.8
Statistics	7615	3288	43%	0.00	3086	2856	93%	1.8
Towers of Powers 2: Power Harder	7040	329	5%	0.00	696	41	6%	9.5