Problems from 2014 ICPC North America Qualifier

	Submissions				Users
Name	Total	Acc.	Ratio	Fastest	Total	Acc.	Ratio	Difficulty
Color Walk	134	39	29%	0.01	40	25	62%	8.7
Eight Queens	12900	3469	27%	0.00	3338	2703	81%	3.4
Flexible Spaces	7090	3854	54%	0.00	3045	2824	93%	1.7
Flip Five	1944	969	50%	0.00	849	739	87%	3.0
Human Cannonball Run	3050	1434	47%	0.00	1090	1001	92%	2.3
Mixed Fractions	13207	6763	51%	0.00	6321	5977	95%	1.5
Narrow Art Gallery	7185	2268	32%	0.00	1804	1570	87%	2.7
Pesky Mosquitoes	1259	319	25%	0.00	279	222	80%	5.2
Tractor	989	283	29%	0.00	335	234	70%	6.0
Units	782	317	41%	0.00	269	227	84%	3.4
Yikes - Bikes!	356	65	18%	0.00	102	54	53%	8.2