//  P.36

import java.util.Scanner;
class Equation
{
	public static void main(String[] args)
	{
		Scanner input = new Scanner(System.in);
		double a, b, c;
		double x, y, disc;

		System.out.print("Three coef: a b c - ");
		a = input.nextDouble();
		while(a!=0)
		{
			b = input.nextDouble();
			c = input.nextDouble();
			disc = b*b - 4*a*c;
			if(disc>0)
			{	x = (-b+Math.sqrt(disc))/(2*a);
				y = (-b-Math.sqrt(disc))/(2*a);
				System.out.println("Two roots: " + x + ", " + y);
			}
			else if(disc==0)
			{	x = (-b-Math.sqrt(disc))/(2*a);
				System.out.println("One root: " + x);
			}
			else	System.out.println("No real roots.");

			System.out.print("Three coef: a b c - ");
			a = input.nextDouble();
		}

		System.out.println("\n\nDone.\n\n");
	}
}