private static void Main(string[] args)
{
var consoleReader = new ConsoleReader();
var input = consoleReader.ReadInt(min: 0);
var spiral = new Spiral(input);
Console.WriteLine("Output:");
Console.WriteLine();
Console.WriteLine(spiral.ToString());
}
private void TestCase(Spiral spiral, string expected)
{
var actual = spiral.ToString();
Assert.AreEqual(expected, actual);
}