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

	Submissions				Users
Name	Total	Acc.	Ratio	Fastest	Total	Acc.	Ratio	Difficulty
Factors	1621	424	26%	0.01	361	288	80%	5.3
Harvard	345	53	15%	0.26	73	45	62%	9.2
Hey, Better Bettor	275	110	40%	0.00	93	73	78%	6.0
Low Power	1890	436	23%	0.11	498	359	72%	5.1
Map Tiles	83	23	28%	0.35	28	19	68%	8.6
Pirate Chest	437	139	32%	0.41	123	97	79%	7.4
Pollution Solution	921	213	23%	0.00	196	151	77%	5.9
Self-Assembly	898	311	35%	0.00	353	247	70%	3.9
Surely You Congest	940	314	33%	0.11	233	208	89%	3.8
Up a Tree	129	54	42%	0.02	51	42	82%	8.2
Матрёшка	716	245	34%	0.07	221	179	81%	4.4