#include <iostream>

#include <cmath>

using namespace std;

int main() {

    int a, b, c;

    cin >> a >> b >> c;

    int s = a + b + c;

    double avg = (double)s / 3.0;

    cout << a << "+" << b << "+" << c << "=" << s << endl;

    int r = (int)round(avg * 100.0);

    cout << r / 100 << "." << (r % 100 < 10 ? "0" : "") << r % 100 << endl;

    return 0;

}