import java.util.*;

public class Average 
{
	public static void main(String [] args)
	{
		// 	1.	declare one variable for input
		// 	2.	initialize the sum
		// 	3.	read an input from the user
		// 	4.	if it is not equal to -999, add to the sum
		// 	5.	repeat steps 3 and 4 until -999 is entered
		// 	6.	take the average
		
		int num; // An integer entered by the user
		int sum; // The sum of all integers
		int counter;
		double average;
		
		Scanner con;
		con = new Scanner(System.in);

		counter = 0;
		sum = 0;

		System.out.println("Enter a positive integer, (-999 marks the end of input)");
		num = con.nextInt();
		
		// While loop is used to repeatedly take an input from the user
		while (num != -999)
		{
			// Loop body
			sum = sum + num;
		
			// Prompt the user enter another integer	
		    System.out.println("Enter a positive integer, (-999 marks the end of input)");
			num = con.nextInt(); 

			// Update the counter			
			counter++;
        }

		if (counter > 0)
		{
			average = sum / counter;
			System.out.println("The average is " + average);
		}
		else
		{
			// avoid the division by 0
			System.out.println("No positive integer has been entered.");
		}
	}
}