using System;

public class Program

{

    public static void Main()

    {

        int arabicMark , computerMark , hebrawMark , mathMark;

        Console.WriteLine("write the mark in the arabic 0-100");

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

        Console.WriteLine("write the mark in the computer 0-100");

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

        Console.WriteLine("write the mark in the hebraw 0-100");

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

        Console.WriteLine("write the mark in the Math 0-100");

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

        Console.WriteLine("The Average is: {0}",(arabicMark+computerMark+hebrawMark+mathMark)/4);

    }

}