A subset A of the set 1,2,3,…,n is called interesting if for any pair of different integers x,y∈A neither x divides y nor y divides x.
An interesting subset A is called amazing if it has the maximum cardinality among all interesting subsets.
Finally, an amazing subset A is called jaw-dropping if it has the minimum sum of elements among all amazing subsets.
Given n, find the sum of elements in any jaw-dropping subset of 1,2,3,…,n.