using System;

public class Program

{

    public static void Main()

    {

        int i , num1 , num2 ;

        double Avg ; 

        for (i=1;i<=8;i++)

         {

            num1=int.Parse(Console.ReadLine());

            num2=int.Parse(Console.ReadLine());

            Avg = (double)(num1 + num2 ) / 2 ;

            Console.WriteLine(" Avg = {0:f2} " , Avg ) ;

​

         }

    }

}