using System;

public class Program

{

    public static void Main()

    {

        double sum=0;

        for(int i=1;i<=5;i++)

        {

            Console.Write("input {0} :" ,i);

            double n = Convert.ToDouble(Console.ReadLine());

            if(n>0)

                sum += n;

            else

                i--;

        }

        Console.WriteLine("sum = {0}" ,sum);

        Console.WriteLine("Average ={0}" ,sum/5);

    }

}