Problems from 2013 University of Chicago Invitational Programming Contest

	Submissions				Users
Name	Total	Acc.	Ratio	Fastest	Total	Acc.	Ratio	Difficulty
3D Printer	761	140	18%	0.00	311	108	35%	8.6
Automatic Trading	1080	313	29%	0.03	257	177	69%	4.9
Can of Worms	564	119	21%	0.05	126	85	67%	6.2
Flooding Fields	243	61	25%	0.02	62	48	77%	6.2
Goat Ropes	167	78	47%	0.00	60	45	75%	5.8
Job Postings	229	94	41%	0.01	73	61	84%	5.2
Overlapping Maps	155	91	59%	0.00	78	69	88%	4.8
Satisfaction Guaranteed	280	21	8%	6.78	25	10	40%	9.1
Uniform Subtrees	115	43	37%	0.23	26	20	77%	7.2
Unreal Estate	289	83	29%	0.01	55	36	65%	8.1
Winter Roads	192	20	10%	0.40	26	15	58%	8.3