#include<stdio.h>

void fun(int year){
	if(year%4==0&&year%100!=0||year%400==0)
		printf("%d 是闰年\n",year);
	else
		printf("%d 不是闰年\n",year);

	
}

int main(){
	int year;
	scanf("%d",&year);
	fun(year);
	return 0;
	
}