using System;

class Program
{
    static void Main()
    {
        Color red = new Color(255, 0, 0);
        Color red1 = new Color(255, 0, 0);
        Color green = new Color(0, 255, 0);
        Color unknownColor = new Color(250, 2, 3);

        Console.WriteLine(red.ToString());
        Console.WriteLine(unknownColor.ToString());

        Object obj = new Object();

        Console.WriteLine(red.Equals(null));
        Console.WriteLine(red.Equals(obj));
        Console.WriteLine(red.Equals(green));
        Console.WriteLine(red.Equals(red1));

        Console.WriteLine($"Red's hashcode: {red.GetHashCode()}, Green's hashcode: {green.GetHashCode()}, unknownColor's hashcode: {unknownColor.GetHashCode()}");
        Console.ReadKey();
    }
}

class Color
{
    public byte R { get; }
    public byte G { get; }
    public byte B { get; }

    public Color(byte r, byte g, byte b)
    {
        R = r;
        G = g;
        B = b;
    }

    public override string ToString()
    {
        if (R == 255 && G == 0 && B == 0) return "Red";
        if (R == 0 && G == 255 && B == 0) return "Green";
        if (R == 0 && G == 0 && B == 255) return "Blue";
        else
        {
            return $"R:{R}, G:{G}, B:{B}";
        }
    }

    public override bool Equals(object obj)
    {
        if (obj == null) return false;

        if (!(obj is Color color)) return false;

        return color.R == R && color.G == G && color.B == B;
    }
    public bool Equals(Color color)
    {
        if (color == null) return false;

       return (color.R == R && color.G == G && color.B == B);
    }

    public override int GetHashCode() => (R << 2 + G << 2)<<1 + B << 2;
}