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

	Submissions				Users
Name	Total	Acc.	Ratio	Fastest	Total	Acc.	Ratio	Difficulty
Factors	1594	414	26%	0.01	353	282	80%	5.0
Harvard	327	52	16%	0.26	69	44	64%	8.9
Hey, Better Bettor	268	106	40%	0.00	90	70	78%	5.9
Low Power	1875	430	23%	0.11	493	354	72%	5.1
Map Tiles	81	22	27%	0.35	26	18	69%	8.3
Матрёшка	705	239	34%	0.07	218	177	81%	4.4
Pirate Chest	432	138	32%	0.41	122	96	79%	7.3
Pollution Solution	902	207	23%	0.00	193	146	76%	6.0
Self-Assembly	896	309	34%	0.00	351	245	70%	3.9
Surely You Congest	923	308	33%	0.11	228	203	89%	3.6
Up a Tree	128	53	41%	0.02	50	41	82%	7.6