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

	Submissions				Users
Name	Total	Acc.	Ratio	Fastest	Total	Acc.	Ratio	Difficulty
Factors	1632	428	26%	0.01	367	291	79%	5.4
Harvard	345	53	15%	0.26	73	45	62%	9.2
Hey, Better Bettor	275	110	40%	0.00	93	73	78%	6.2
Low Power	1928	441	23%	0.11	503	364	72%	4.9
Map Tiles	91	25	27%	0.35	29	20	69%	8.4
Pirate Chest	439	140	32%	0.41	124	98	79%	7.5
Pollution Solution	924	215	23%	0.00	197	152	77%	6.0
Self-Assembly	913	314	34%	0.00	356	249	70%	3.9
Surely You Congest	957	319	33%	0.11	237	212	89%	3.8
Up a Tree	129	54	42%	0.02	51	42	82%	8.6
Матрёшка	742	255	34%	0.07	228	186	82%	4.3