Problems from North America Championship 2020

	Submissions				Users
Name	Total	Acc.	Ratio	Fastest	Total	Acc.	Ratio	Difficulty
All Kill	53	44	83%	0.00	32	29	91%	2.6
Another Coin Weighing Puzzle	357	117	33%	0.00	102	86	84%	4.5
Bomas	360	109	30%	0.18	64	52	81%	6.0
Editing Explosion	96	77	80%	0.06	50	47	94%	3.6
Grid Guardian	67	27	40%	0.63	15	10	67%	7.6
Hopscotch 50	704	336	48%	0.00	258	239	93%	2.4
ICPC Camp	647	177	27%	0.16	134	121	90%	3.3
Letter Wheels	600	200	33%	0.13	153	135	88%	4.1
Lunchtime Name Recall	385	79	21%	1.13	61	41	67%	7.9
Mini Battleship	337	235	70%	0.02	165	155	94%	2.8
Rooted Subtrees	364	155	43%	0.14	122	111	91%	3.6
Tomb Raider	284	72	25%	0.03	65	53	82%	6.8