using System;

namespace ConsoleApplication1
{
	/// <summary>
	/// Summary description for Leap.
	/// </summary>
	public class Leap
	{
		public static bool LeapYear(int year)
		{
			bool is_leap;
			if( (year%4 == 0 && year%100!=0) || year%400==0)
				is_leap = true;
			else
				is_leap = false;

			return is_leap;
		}
		public static void Main()
		{
			int year;
			char answer;

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

				if(LeapYear(year))
					Console.WriteLine("It is a leap year");
				else
					Console.WriteLine("It is not a leap year");

				Console.Write("\nConitue, yes(Y) or no(N)?: ");
				answer = Console.ReadLine()[0];
			}while(answer!='N' && answer!='n');
		}
	}
}