using System;

namespace Example27
{
	/// <summary>
	/// Summary description for Class1.
	/// </summary>
	class Class1
	{
		public static bool LeapYear(int year)
		{
			bool isLeapYear;

			if ((year % 4 == 0 && year % 100 != 0) || (year % 400 == 0))
				isLeapYear = true;
			else
				isLeapYear = false;

			return isLeapYear;
		}

		/// <summary>
		/// The main entry point for the application.
		/// </summary>
		[STAThread]
		static void Main(string[] args)
		{
			int year;
			char answer;

			do
			{
				Console.Write("\nPlease input year: ");
				year = int.Parse(Console.ReadLine());

				if (LeapYear(year))
					Console.WriteLine("{0} is a leap year.", year);
				else
					Console.WriteLine("{0} is not a leap year.", year);

				Console.Write("\nContinue, yes (Y) or no (N)?: ");
				answer = char.Parse(Console.ReadLine());
			} while (answer != 'N' && answer != 'n');
		}
	}
}