Problems from 2014 ICPC North America Qualifier

	Submissions				Users
Name	Total	Acc.	Ratio	Fastest	Total	Acc.	Ratio	Difficulty
Color Walk	148	45	30%	0.01	45	28	62%	8.6
Eight Queens	15700	4430	28%	0.00	4174	3408	82%	3.0
Flexible Spaces	8917	4961	56%	0.00	4016	3739	93%	1.8
Flip Five	2600	1321	51%	0.00	1055	916	87%	3.2
Human Cannonball Run	4385	2181	50%	0.00	1718	1583	92%	2.0
Mixed Fractions	15415	7810	51%	0.00	7266	6865	94%	1.6
Narrow Art Gallery	9791	3170	32%	0.00	2440	2120	87%	3.0
Pesky Mosquitoes	1446	372	26%	0.00	332	261	79%	5.3
Tractor	1107	324	29%	0.00	373	260	70%	5.9
Units	1053	393	37%	0.00	338	285	84%	3.3
Yikes - Bikes!	382	71	19%	0.00	113	57	50%	8.3