Problems from SANDVIK Challenge 2020

	Add	Remove

Name	Fastest	Shortest	Authors	Full Solves	Ratio	Difficulty	Languages
Alloys	0.00	20	886	710	80%	3.4Medium	en
Bonbons	0.00	444	53	33	62%	6.5Hard	en
Closing the Borders	0.00	668	71	43	61%	7.5Hard	en
Sequential Manufacturing	0.00	50	297	257	87%	3.1Medium	en
Witch Dance	0.23	650	74	59	80%	4.1Medium	en