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

	Submissions				Users
Name	Total	Acc.	Ratio	Fastest	Total	Acc.	Ratio	Difficulty
Factors	1756	464	26%	0.01	389	310	80%	5.7
Harvard	353	53	15%	0.26	76	45	59%	9.5
Hey, Better Bettor	300	116	39%	0.00	102	79	77%	7.0
Low Power	1969	461	23%	0.11	522	382	73%	5.0
Map Tiles	98	28	29%	0.35	32	23	72%	9.0
Pirate Chest	474	150	32%	0.41	133	104	78%	7.8
Pollution Solution	977	231	24%	0.00	215	167	78%	5.9
Self-Assembly	949	333	35%	0.00	374	265	71%	4.0
Surely You Congest	1054	345	33%	0.10	252	225	89%	3.7
Up a Tree	136	59	43%	0.02	55	46	84%	8.0
Матрёшка	802	280	35%	0.06	249	205	82%	4.5