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Counting the number of subsets of an array whose GCD is 1?
Array length n <= 100
Array elements can be up to 1e9.
If the elements were ~ 2e5 it could be done by fixing the length of subsets and counting them individually with the mobius function. But I cant think of any way to optimize this approach to work for the given constraints.
Does this problem require a completely different approach/technique?
