Problems from International Collegiate Programming Contest (ACM-ICPC) World Finals 2013

	Submissions				Users
Name	Total	Acc.	Ratio	Fastest	Total	Acc.	Ratio	Difficulty
Factors	2036	506	25%	0.01	474	339	72%	5.5
Harvard	372	59	16%	0.23	87	48	55%	9.4
Hey, Better Bettor	340	130	38%	0.00	125	89	71%	6.5
Low Power	2818	652	23%	0.11	664	475	72%	5.0
Map Tiles	126	29	23%	0.35	52	23	44%	8.2
Pirate Chest	508	164	32%	0.40	148	117	79%	7.7
Pollution Solution	1055	249	24%	0.00	232	169	73%	6.0
Self-Assembly	1130	420	37%	0.00	437	313	72%	3.9
Surely You Congest	1356	417	31%	0.11	319	267	84%	3.8
Up a Tree	164	59	36%	0.02	75	46	61%	8.5
Матрёшка	828	294	36%	0.07	248	201	81%	4.3