using System;

public class Program

{

    public static void Main()

    {

        double a, b, c, r1, r2, delta;

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

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

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

        delta = Math.Pow(b, 2) - 4 * a * c;

        if (delta < 0 || a == 0)

        {

            Console.WriteLine("Impossível Calcular");

        }

        else 

        {

            r1 = -

        }

    }

}