cppp

#include <iostream>
#include <cstdlib>
using namespace std;

int main()
{
int a,n=0,suma=0;
while (a>0)
{
cin >> a;
    if (a<=0){
        break;
    }
suma+=a;
++n;
}
cout << suma/n << endl;
system("pause");
return 0;
}