#include <iomanip>
#include <iostream>
using namespace std;
int main() {
    int a, b, c, d, e, f;
    cin >> a;
    cin >> b;
    cin >> c;
    cin >> d;
    cin >> e;
    cin >> f;
    double x;
    x = (a + b + c + d + e + f)*1.0/ 6;
    cout << x << endl;
    cout << fixed << setprecision(2) << x << endl;

    return 0;
}