using System;

public class Program

{

    public static void Main()

    {

        Console.WriteLine("ax² < b");

        Console.Write("a = "); int a = int.Parse(Console.ReadLine());

        Console.Write("b = "); int b = int.Parse(Console.ReadLine());

        if (a != 1 && a != -1) Console.WriteLine("\n{0}x² < {1}", a, b);

        if (a == 1) Console.WriteLine("\nx² < {0}", b);

        if (a == -1) Console.WriteLine("\n-x² < {0}", b);

        double x;

        x = Math.Sqrt(Math.Abs(b/(double)a));

        if(a > 0)

        {

            if (b <= 0) Console.WriteLine("No Solution");

            else Console.WriteLine("Solution: x ∈ (-{0:f2}; {0:f2})", x);

        }

        if (a < 0)

        {

            if (b < 0) Console.WriteLine("Solution: x ∈ (-inf; -{0:f2}) U ({0:f2}; +inf)",x);

            if (b >= 0) Console.WriteLine("Solution: x ∈ ℝ");

        }

        if (a == 0)

        {

            if (b > 0) Console.WriteLine("Solution: x ∈ ℝ");

            else Console.WriteLine("No Solution");

        }

    }

}