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

	Submissions				Users
Name	Total	Acc.	Ratio	Fastest	Total	Acc.	Ratio	Difficulty
Factors	1672	439	26%	0.01	372	296	80%	5.5
Harvard	349	53	15%	0.26	75	45	60%	9.4
Hey, Better Bettor	279	111	40%	0.00	95	74	78%	6.5
Low Power	1932	444	23%	0.11	506	367	73%	5.0
Map Tiles	92	26	28%	0.35	30	21	70%	8.2
Pirate Chest	452	143	32%	0.41	127	100	79%	7.7
Pollution Solution	935	219	23%	0.00	200	155	78%	6.0
Self-Assembly	915	316	35%	0.00	358	251	70%	3.9
Surely You Congest	965	322	33%	0.11	240	214	89%	3.8
Up a Tree	131	56	43%	0.02	52	43	83%	8.5
Матрёшка	747	258	35%	0.07	231	189	82%	4.3