Problems from 2013 University of Chicago Invitational Programming Contest

	Submissions				Users
Name	Total	Acc.	Ratio	Fastest	Total	Acc.	Ratio	Difficulty
3D Printer	974	160	16%	0.00	400	122	30%	8.9
Automatic Trading	1265	384	30%	0.03	308	214	69%	5.1
Can of Worms	601	133	22%	0.04	140	97	69%	6.3
Flooding Fields	299	75	25%	0.02	76	58	76%	7.8
Goat Ropes	196	87	44%	0.00	74	52	70%	7.1
Job Postings	244	107	44%	0.01	80	68	85%	5.0
Overlapping Maps	202	105	52%	0.00	88	78	89%	5.0
Satisfaction Guaranteed	366	25	7%	6.78	35	11	31%	9.6
Uniform Subtrees	128	46	36%	0.23	29	23	79%	6.4
Unreal Estate	326	90	28%	0.01	65	43	66%	7.7
Winter Roads	337	33	10%	0.18	50	20	40%	9.0