Problems from North American Invitational Programming Contest (NAIPC) 2019

	Submissions				Users
Name	Total	Acc.	Ratio	Fastest	Total	Acc.	Ratio	Difficulty
Busy Board	588	97	16%	0.01	137	75	55%	7.5
Cost of Living	231	40	17%	0.01	73	30	41%	8.9
Cutting Strings	339	69	20%	0.09	73	40	55%	8.4
Heaps of Fun	143	75	52%	0.00	65	55	85%	5.7
Intersecting Rectangles	1569	446	28%	0.03	321	242	75%	6.1
It's a Mod, Mod, Mod, Mod World	1214	243	20%	0.05	242	124	51%	6.9
Knight of the Tarot Cards	290	62	21%	4.33	51	29	57%	8.5
Monotony	317	148	47%	0.61	99	77	78%	7.1
Piece of Cake	1092	292	27%	0.01	340	170	50%	8.0
Planes, Trains, but not Automobiles	320	87	27%	0.04	77	56	73%	7.9
Rocket Powered Hovercraft	303	72	24%	0.00	46	38	83%	5.5
Subsequences in Substrings	1203	501	42%	0.01	326	274	84%	4.8
XOR Sequences	373	148	40%	0.00	125	104	83%	4.4