#include <iostream>
using namespace std;

int main(){
    cout << "shemoitane sami ricxvi: " ;
    int a,b,c; //ganacxadi cvladebze
    cin >> a >> b >> c; // cin-is sashualebit shemokavs ricxvebi
    double avrg = (a+b+c)/3; // cvladi romelic inaxavs sash. aritmetikuls double imito ro sheidzleba sash arit. atwiladi gamovides

    cout << "sashualo tolia: " << avrg << endl; // dabechdavs sashualos
}