368. Largest Divisible Subset 
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Problem
Given a set of distinct positive integers nums, return the largest subset answer such that every pair (answer[i], answer[j]) of elements in this subset satisfies:
answer[i] % answer[j] == 0, oranswer[j] % answer[i] == 0
If there are multiple solutions, return any of them.
Example 1:
Input: nums = [1,2,3] Output: [1,2] Explanation: [1,3] is also accepted.
Example 2:
Input: nums = [1,2,4,8] Output: [1,2,4,8]
Constraints:
1 <= nums.length <= 10001 <= nums[i] <= 2 * 109- All the integers in
numsare unique.