using System;

public class Program

{

    public static void Main()

    {

        int a = 9;

        int b = 2;

        //

        if (a > b)

        {

            int c = a - b;

            Console.WriteLine(c);

        }

        else

        {

            int c = b - a;

            Console.WriteLine(c);

        }

    }

}