using System;

public class Program

{

    static double average(double a, double b, double c)

    {

       double v = (a+b+c)/3;

        return v;

    }

    public static void Main()

    {

        Console.Write("Enter the number of computer");

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

        for ( int i=0; i<n; i++)

        {

          double p=0;

            Console.Write("Enter computer name");

            string c = Console.ReadLine();

            for ( int j=0;j<3;j++)

            {

               Console.Write("Enter the model price");

                p= double.Parse(Console.ReadLine());

                p= double.Parse(Console.ReadLine());

                p= double.Parse(Console.ReadLine());

            }

            Console.WriteLine("av= "+ average(p, p, p));

        }

    }

}