/*
Will Clarkson
wclarkso
P01 and P02
Feb 7, 2009
*/

public class Distance{

    public static void main(String [] args)
    {
	int x = Integer.parseInt(args[0]);
	int y = Integer.parseInt(args[1]);

	double distance = Math.sqrt(x*x+y*y);

	System.out.println(distance);
    }
}