using System;

public class SolveEquation{

    static int calDelta(int a, int b, int c){

        return b*b-4*a*c;

    }

    public static void Main(){

        int delta,a,b,c;

        a=1;

        b=4;

        c=-5;

        delta = calDelta(a,b,c);

        if (delta < 0) 

            Console.WriteLine("There is no real roots.");

        else if (delta == 0){

            Console.WriteLine("There are repeated roots: {0}.", -b/(2*a));

        }

        else if (delta>0){

            double root1 = (-b+Math.Sqrt(b*b-4*a*c))/(2*a);

            double root2 = (-b-Math.Sqrt(b*b-4*a*c))/(2*a);

            Console.WriteLine("There are two real roots: {0} and {1}.",root1,root2);

        }

    }

}