using System;

public class Program

{

    public static void Main()

    {

        Console.WriteLine("Hello World");

        double a = double.Parse(Console.ReadLine());

        double b = double.Parse(Console.ReadLine());

        double c = double.Parse(Console.ReadLine());

        double D = b*b-4*a*c;

        double X1 = (-b+Math.Sqrt(D))/2*a;

        double X2 = (-b- Math.Sqrt(D))/2*a;

        Console.ReadLine(X1);

        Console.ReadLine(X2);

    }

}