#include <iostream>
#include <cstdio>

using namespace std;
int main()
{
    double a, b, c;
    cin >> a >> b >> c;
    double avg;
    avg = (a * 2.0 + b * 3.0 + c * 5.0) / 10;
    printf("MEDIA = %.1lf",avg);

    return 0;
}