using System;

namespace Associativite
{
	class MainClass
	{
		public static void Main (string[] args)
		{
			double a = 1e300;
			double b = 1;
			Console.WriteLine("On a a = " + a + " et b = " + b + ".");
			double c = (a - a) + b;
			Console.WriteLine("c = " + c);
			double d = a - (a - b);
			Console.WriteLine("d = " + d);
		}
	}
}