#include <stdio.h>
int main()
{
int year,leap;
printf("输入年份:");
scanf("%d",&year);
if(year%4==0){
if(year%100==0){
if(year%400==0)
leap=1;
else
leap=0;
}else
leap=1;
}else
leap=0;
if(leap)
printf("%d是闰年\n",year);
else
printf("%d不是闰年\n",year);
return 0;
}