package New.Week;
import java.util.Scanner;
public class RunNian {
public static void main(String[] args) {
Scanner scan = new Scanner(System.in);
int n = scan.nextInt();
if((n%4==0&&n%100!=0)||n%400==0){
System.out.println(n+"是闰年");
}
else{
System.out.println(n+"不是闰年");
}
}
}