import java.util.Scanner;  public class demo_1 {/* 判断闰年 */   public static void main(String[] args) {
        Scanner in = new Scanner(System.in);  while (in.hasNext()){ int year = in.nextInt();  if (year<0 || year>10000000){
                System.out.println("error,enter again!");  } else{ if (isLeapYear(year))
                    System.out.println(year+"是闰年");  else  System.out.println(year+"不是闰年");  }
        }
    } public static boolean isLeapYear(int x){ return (x%4==0 && x%100!=0 || x%400==0) ? true : false;  }
}