Problems from North America Championship 2020

	Submissions				Users
Name	Total	Acc.	Ratio	Fastest	Total	Acc.	Ratio	Difficulty
All Kill	126	103	82%	0.00	58	51	88%	3.6
Another Coin Weighing Puzzle	792	221	28%	0.00	149	121	81%	6.2
Bomas	486	145	30%	0.18	86	70	81%	6.6
Editing Explosion	158	122	77%	0.04	78	74	95%	4.2
Grid Guardian	89	38	43%	0.63	29	20	69%	7.9
Hopscotch 50	1847	808	44%	0.00	415	378	91%	3.0
ICPC Camp	1629	447	27%	0.15	227	196	86%	5.0
Letter Wheels	1549	540	35%	0.04	239	199	83%	5.8
Lunchtime Name Recall	475	108	23%	0.81	78	56	72%	7.7
Mini Battleship	1150	606	53%	0.02	297	262	88%	4.0
Rooted Subtrees	1388	414	30%	0.11	212	193	91%	3.9
Tomb Raider	391	105	27%	0.03	94	80	85%	5.7