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



int main()
{
    int numofStudents;
    int curr, sum=0;
    double average;

    cout << "Please enter number of students" << endl;
    cin >> numofStudents;
    cout << "Write grades" << endl;
    
    for (int count = 1; count <= numofStudents;++count) {
        cin >> curr;
        sum += curr;
    }
    average = (double)(sum / numofStudents);


    cout << "The average grade is "<<average << endl;

    return 0;
}