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

	Submissions				Users
Name	Total	Acc.	Ratio	Fastest	Total	Acc.	Ratio	Difficulty
Counting Stars	4866	1685	35%	0.00	1449	1256	87%	2.4
Heliocentric	1725	995	58%	0.00	902	842	93%	1.8
Limited Correspondence	641	165	26%	0.03	73	50	68%	4.6
Mandelbrot	1824	597	33%	0.00	576	504	88%	3.0
Matrix Inverse	2261	785	35%	0.00	771	640	83%	3.1
Polish Notation	509	165	32%	0.00	167	139	83%	3.3
Preludes	1408	764	54%	0.00	749	699	93%	1.8
Prime Spiral	464	185	40%	0.00	135	117	87%	4.1
Reversing Roads	960	243	25%	0.00	233	182	78%	5.1
Sierpiński Circumference	2048	785	38%	0.00	683	616	90%	2.5
Statistics	5842	2587	44%	0.00	2434	2256	93%	1.7
Towers of Powers 2: Power Harder	5845	269	5%	0.00	572	31	5%	9.5