import user.*;
public class Li4_3
{
	public static void main(String args[])
	{
		for(int i=1;i<5;i++)
		{
			System.out.println("請輸入年份：");
			int year=ReadNumber.readInteger();
			boolean a;
			a=(year%4==0&&year%100!=0)||year%400==0;
			if(a==true)
				System.out.println(year+"年是閏年");
			else
				System.out.println(year+"年不是閏年");
		}
	}
}