#include<algorithm>
int solution(vector<int> &A) {
    // write your code in C++14 (g++ 6.2.0)
    sort(A.begin(), A.end());
    int size = (int)A.size();
    return max(A[0] * A[1] * A[size - 1], A[size - 3] * A[size - 2] * A[size - 1]);
}