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

	Submissions				Users
Name	Total	Acc.	Ratio	Fastest	Total	Acc.	Ratio	Difficulty
Factors	2142	534	25%	0.01	500	355	71%	5.5
Harvard	389	61	16%	0.10	90	49	54%	9.4
Hey, Better Bettor	362	136	38%	0.00	132	95	72%	6.6
Low Power	2892	687	24%	0.11	691	496	72%	5.0
Map Tiles	136	31	23%	0.35	58	25	43%	8.5
Pirate Chest	539	176	33%	0.40	157	125	80%	7.6
Pollution Solution	1103	263	24%	0.00	250	183	73%	6.0
Self-Assembly	1185	442	37%	0.00	461	332	72%	4.0
Surely You Congest	1502	458	30%	0.10	345	288	83%	3.7
Up a Tree	186	62	33%	0.02	78	48	62%	8.1
Матрёшка	861	311	36%	0.07	263	212	81%	4.4