Problems from 2014 ICPC North America Qualifier

	Submissions				Users
Name	Total	Acc.	Ratio	Fastest	Total	Acc.	Ratio	Difficulty
Color Walk	143	42	29%	0.01	42	27	64%	8.4
Eight Queens	14858	4137	28%	0.00	3957	3223	81%	3.3
Flexible Spaces	8332	4605	55%	0.00	3704	3444	93%	1.8
Flip Five	2342	1189	51%	0.00	951	828	87%	3.0
Human Cannonball Run	3604	1764	49%	0.00	1357	1250	92%	2.1
Mixed Fractions	14472	7329	51%	0.00	6822	6441	94%	1.7
Narrow Art Gallery	8973	2841	32%	0.00	2224	1922	86%	3.0
Pesky Mosquitoes	1336	342	26%	0.00	308	244	79%	5.2
Tractor	1061	313	30%	0.00	357	251	70%	5.8
Units	1021	379	37%	0.00	322	271	84%	3.3
Yikes - Bikes!	371	66	18%	0.00	110	55	50%	8.3