cycle for,no more.

import java.util.Scanner;
public class easys {
 public static void main(String[] args) {
        Scanner in = new Scanner(System.in);
        int N = in.nextInt();
        int sum = 0;
        int curr = 0;
        double result = 0.0;
        for(int i=0;i<N;i++){
            curr = in.nextInt();
            sum = sum + curr;

        }
     result = (double)sum/N;
        System.out.printf("%.6f",result);

    }

}

public class HeatingMain1457_Accepted {
    public static void main(String[] args) {
        PrintWriter writer = new PrintWriter(new OutputStreamWriter(System.out));
        Scanner x = new Scanner(System.in);
        short  n = x.nextShort();
        double s = 0;
        for (int i = 0; i < n; i++) {
            s += x.nextInt();
        }
        writer.printf("%.6f", s / n);
        writer.close();
    }
}