class Program
{
    static void Main(string[] args)
    {
        string[] input = Console.ReadLine()!.Split(' ');
        decimal leftNum = decimal.Parse(input[0]);
        decimal rightNum = decimal.Parse(input[1]);

        if (leftNum > rightNum)
        {
            decimal tmp = leftNum;
            leftNum = rightNum;
            rightNum = tmp;
        }

        Console.WriteLine(rightNum - leftNum);
    }
}