#include <iostream>
#include<bits/stdc++.h>
#include <cstdio>
using namespace std;
int main (){
    double A,B,C;
    cin >> A>> B>>C;
    cout << "MEDIA = "<<fixed<<setprecision(1)<<(A*2+B*3+C*5)/10.0<<endl;
    return 0;
}