Problems from North American Invitational Programming Contest (NAIPC) 2017

	Submissions				Users
Name	Total	Acc.	Ratio	Fastest	Total	Acc.	Ratio	Difficulty
Apple Market	470	96	20%	0.07	118	60	51%	8.3
Blazing New Trails	788	96	12%	0.18	151	68	45%	8.3
Heaps from Trees	370	119	32%	0.15	160	104	65%	6.1
Incremental Double Free Strings	48	20	42%	0.01	21	15	71%	6.1
Maximum Color Clique	107	32	30%	0.04	37	27	73%	6.9
Pieces of Parentheses	1364	274	20%	0.01	323	217	67%	7.0
Ski Resort	115	10	9%	0.25	12	8	67%	5.9
Stars in a Can	276	89	32%	0.09	71	48	68%	5.4
Stretching Streamers	365	158	43%	0.03	168	131	78%	4.6
Unbalanced Parentheses	38	19	50%	0.02	14	10	71%	7.4
Yin and Yang Stones	2512	1583	63%	0.00	1429	1331	93%	1.7