using System;

public class Program

{

    public static void Main()

    {

        Console.WriteLine("Enter a b & c for the equation");

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

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

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

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

        double x1 = (-b + Math.Sqrt(inRoot)) / (2 * a);

        double x2 = (-b - Math.Sqrt(inRoot)) / (2 * a);

        if (inRoot == 0)

            Console.WriteLine("Single root X = {0}", -b / (2 * a));

        else if (inRoot < 0)

            Console.WriteLine("No roots");

        else

            Console.WriteLine("X1 = {0} X2= {0}", x1, x2);

    }

}