Problems from SANDVIK Challenge 2020

	Submissions				Users
Name	Total	Acc.	Ratio	Fastest	Total	Acc.	Ratio	Difficulty
Alloys	256	89	35%	0.00	90	78	87%	4.5
Bonbons	60	22	37%	0.01	28	18	64%	7.7
Closing the Borders	143	33	23%	0.00	41	26	63%	7.7
Sequential Manufacturing	98	65	66%	0.00	59	55	93%	2.8
Witch Dance	97	13	13%	0.28	12	8	67%	7.3