#include <iostream>
#include <math.h>
using namespace std;
int main()
{
    int a[10];
    double sr, sum=0;


    for (int i = 0; i < 10; i++)
    {
        cout << "a[" << i << "]=";
        cin >> a[i];
    }

    for (int i = 0; i < 10; i++)
    {
        sum = sum + a[i];
    }

    sr = sum / 10;
    cout << sr;

    //for (int i = 0; i < 10; i++)
    //{

    //      cout << a[i];
    //  cout << endl;
    //}




    system("pause");
    return 0;
}