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

	Submissions				Users
Name	Total	Acc.	Ratio	Fastest	Total	Acc.	Ratio	Difficulty
Counting Stars	14398	4153	29%	0.00	2960	2504	85%	3.1
Heliocentric	2971	1709	58%	0.00	1519	1427	94%	1.8
Limited Correspondence	1113	224	20%	0.03	136	87	64%	7.3
Mandelbrot	3532	1058	30%	0.00	965	836	87%	3.0
Matrix Inverse	3546	1294	36%	0.00	1268	1077	85%	2.9
Polish Notation	1811	539	30%	0.00	445	372	84%	3.2
Preludes	2463	1327	54%	0.00	1290	1214	94%	1.8
Prime Spiral	742	318	43%	0.00	236	212	90%	3.2
Reversing Roads	2694	640	24%	0.00	555	438	79%	4.5
Sierpiński Circumference	3189	1205	38%	0.00	1060	942	89%	2.7
Statistics	12424	5415	44%	0.00	5082	4674	92%	2.2
Towers of Powers 2: Power Harder	7672	358	5%	0.00	776	50	6%	9.5