#include <iostream>
    #include <functional>
    #include <numeric>
    using namespace std;
    int mnewfunction (int n, int m) 
    {
        return n + 3 * m;
    }
    struct N 
    {
        int operator()(int n, int m) 
        {
            return n + 3 * m;
        }
    } structObject;
    int main () 
    {
        int a = 200;
        int Arr[] = {11, 21, 31};
        cout << accumulate (Arr, Arr + 3, a, minus<int>() );
        cout << endl;
        return 0;
    }