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

	Submissions				Users
Name	Total	Acc.	Ratio	Fastest	Total	Acc.	Ratio	Difficulty
Counting Stars	4975	1731	35%	0.00	1486	1288	87%	2.5
Heliocentric	1901	1078	57%	0.00	970	908	94%	1.8
Limited Correspondence	658	167	25%	0.03	74	51	69%	4.8
Mandelbrot	1938	628	32%	0.00	605	529	87%	3.0
Matrix Inverse	2337	820	35%	0.00	808	670	83%	3.6
Polish Notation	582	187	32%	0.00	180	150	83%	3.3
Preludes	1521	809	53%	0.00	787	738	94%	1.8
Prime Spiral	503	195	39%	0.00	146	125	86%	4.1
Reversing Roads	979	250	26%	0.00	240	189	79%	5.1
Sierpiński Circumference	2191	816	37%	0.00	723	644	89%	2.7
Statistics	6417	2814	44%	0.00	2638	2448	93%	1.7
Towers of Powers 2: Power Harder	6176	271	4%	0.00	604	33	5%	9.5