import javax.swing.JOptionPane;

public class Proj8
{
	public static void main(String[] args)
	{
		
		String input = JOptionPane.showInputDialog("Enter the year:");
		int year = Integer.parseInt(input);
		if(year%4 == 0)
		{
			System.out.println(year + " is a leap year.");
			if(year%100 == 0)
			{
				System.out.println(year + " is not a leap year.");
				if(year%400 == 0)
				{
					System.out.println(year + " is a leap year.");
				}
			}
		}
		else
		{
			System.out.println(year + " is not a leap year.");
		}
		
	}
}