using static System.Console;

public class Program

{

    public static void Main()

    {

        var valores = ReadLine().Split(' ');

        if (double.TryParse(valores[0],  out var a) && double.TryParse(valores[1],  out var b) && double.TryParse(valores[2],  out var c))

        {

            double x1, x2;

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

            WriteLine($"Delta: {delta}");

        }

    }

}