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

	Submissions				Users
Name	Total	Acc.	Ratio	Fastest	Total	Acc.	Ratio	Difficulty
Factors	1742	461	26%	0.01	385	307	80%	5.8
Harvard	352	53	15%	0.26	75	45	60%	9.4
Hey, Better Bettor	296	115	39%	0.00	99	78	79%	6.5
Low Power	1945	452	23%	0.11	514	374	73%	5.0
Map Tiles	97	27	28%	0.35	31	22	71%	8.6
Pirate Chest	457	145	32%	0.41	129	102	79%	7.5
Pollution Solution	970	227	23%	0.00	210	163	78%	6.1
Self-Assembly	944	330	35%	0.00	372	263	71%	4.0
Surely You Congest	1048	342	33%	0.10	250	224	90%	4.0
Up a Tree	135	58	43%	0.02	54	45	83%	8.1
Матрёшка	768	269	35%	0.07	239	195	82%	4.4