AMR15B how to solve this question ??
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Codeforces (c) Copyright 2010-2024 Mike Mirzayanov
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Server time: Dec/23/2024 08:14:42 (k2).
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A simpler problem: Given an array of integers, find sum of minimum elements of each subset.
Solution: Sort the array so that A[0]<=A[1]<=...<=A[n-1]. Answer= sum 2^(n-i+1)*A[i].
From now on by f(A) we will denote this value for an array.
Prime factorize each number and for each prime p<=10^5 store a list where for each a[i] which is a multiple of p the power of p in a[i] is stored in the list. Let M[p] be this list p.
Answer= product pf(M[p]) over all primes from 1 to 10^5
f(M[p]) can get quite large so it's advisable to compute it modulo 10^9+6 (because x109 + 6 = 1 mod 10^9+7.
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