using System;

public class Program

{

    public static void Main()

    {

        Console.WriteLine("napishete visochina na 1");

        var a = int.Parse(Console.ReadLine());

        Console.WriteLine("napishete visochina na 2");

        var b = int.Parse(Console.ReadLine());

        Console.WriteLine("razlikata im e {0} ", Math.Abs(a-b));

    }

}