#include<stdio.h>

    int main(void)

    {  

      /*********Begin*********/

      int year,a;

      scanf("%d",&year);

      if(year%400==0)

        a=1;

    else

    {

        if(year%4==0&&year%100!=0)

            a=1;

        else

            a=0;

    }

    if(a==1)

    {

        printf("%d 是闰年！\n",year);

    }

    else

    {

        printf("%d 不是闰年！\n",year);

    }

      /*********End**********/ 

       return 0;

    }