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

	Submissions				Users
Name	Total	Acc.	Ratio	Fastest	Total	Acc.	Ratio	Difficulty
Counting Stars	6044	2078	34%	0.00	1741	1509	87%	2.7
Heliocentric	2187	1255	57%	0.00	1112	1043	94%	1.8
Limited Correspondence	809	179	22%	0.03	91	60	66%	6.3
Mandelbrot	2358	752	32%	0.00	719	628	87%	3.0
Matrix Inverse	2698	967	36%	0.00	952	799	84%	3.0
Polish Notation	1175	325	28%	0.00	275	226	82%	3.3
Preludes	1711	924	54%	0.00	889	837	94%	1.8
Prime Spiral	586	231	39%	0.00	171	151	88%	3.5
Reversing Roads	1620	390	24%	0.00	347	285	82%	4.4
Sierpiński Circumference	2528	929	37%	0.00	826	732	89%	2.7
Statistics	7902	3424	43%	0.00	3210	2977	93%	1.7
Towers of Powers 2: Power Harder	7096	333	5%	0.00	705	43	6%	9.5