using System;

class Program
{
	static void Main (string[] argv)
	{
		if (argv.Length != 2)
		{
			Console.WriteLine ("Use: Calc [number] [number], for example: Calc 10 6");
			return;
		}
		try
		{
			int x = int.Parse (argv[0]);
			int y = int.Parse (argv[1]);
			Console.WriteLine ($"{x} + {y} = {Calc.Add (x,y)}");
			Console.WriteLine ($"{x} - {y} = {Calc.Subtract (x,y)}");
		}
		catch (Exception ex)
		{
			Console.WriteLine (ex.Message);
		}
		return;
	}
}
