Question

how to find sum of subsequence * gcd of subsequence of all k length array

Answer 1

Input : arr[] = [2, 1, 4, 6] k = 3 Output : 2 GCD of [2, 4, 6] is 2 Input : arr[] = [1, 2, 3] k = 3 Output : 1 GCD of [1, 2, 3] is 1