Problems from 2014 ICPC North America Qualifier

	Submissions				Users
Name	Total	Acc.	Ratio	Fastest	Total	Acc.	Ratio	Difficulty
Color Walk	141	40	28%	0.01	41	26	63%	8.6
Eight Queens	14610	4059	28%	0.00	3888	3162	81%	3.5
Flexible Spaces	8196	4524	55%	0.00	3623	3373	93%	1.7
Flip Five	2286	1161	51%	0.00	928	805	87%	3.0
Human Cannonball Run	3468	1689	49%	0.00	1290	1192	92%	2.1
Mixed Fractions	13908	7096	51%	0.00	6624	6261	95%	1.6
Narrow Art Gallery	8639	2731	32%	0.00	2141	1850	86%	2.9
Pesky Mosquitoes	1329	338	25%	0.00	305	240	79%	5.1
Tractor	1046	308	29%	0.00	353	247	70%	5.9
Units	995	373	37%	0.00	312	265	85%	3.2
Yikes - Bikes!	369	66	18%	0.00	108	55	51%	8.3