//
//	Review for Java
//
//	Goal: read in data from a file and sum up them
//
//

import java.util.Scanner;
import java.text.DecimalFormat;

public class SumUpData
{
	public static void main(String[] args)
	{
		DecimalFormat f2 = new DecimalFormat("0.00");
		Scanner input = new Scanner(System.in);
		int data;
		int sum = 0;
		int size = 0;
		double average;
		while(input.hasNext())
		{
			data = input.nextInt();					// read data
			sum = sum + data;
			size ++;
		}
		average = (double)sum / size;
		System.out.println("Average = " + f2.format(average));
	}
}