using System;

public class Program

{

    public static void Main()

    {

    int num1, num2, num3, num4; 

    Console.Write("Input the first number: ");

    num1 = Convert.ToInt32(Console.ReadLine());

    Console.Write("Input the second number: ");

    num2 = Convert.ToInt32(Console.ReadLine());

    Console.Write("Input the third number: ");

    num3 = Convert.ToInt32(Console.ReadLine());

    Console.Write("Input the fourth number: ");

    num4 = Convert.ToInt32(Console.ReadLine());

    int average = (num1 + num2 + num3 + num4) / 4;

        Console.WriteLine(average);

    }

}