import javax.swing.*;
import java.io.*;

public class Mittelwert
{
public static void main (String args[]) throws IOException
{
	BufferedReader ein = new BufferedReader(new InputStreamReader(System.in));
	int n;

	System.out.print("Anzahl Zahlen: ");
	n = Integer.parseInt(ein.readLine());
	int i=1;
	double MW=0.0;
	while(i<=n && n!=0)
	{
		System.out.print("Zahl " + i + ":");
		MW += Double.parseDouble (ein.readLine());
		System.out.println ("Wert: " + MW);
		i++;
	}
	System.out.println ("Mittelwert: " + (MW=MW/n));
}
}