#include <stdio.h>

main()

{

int year,month,days;

printf("请输入一个年份月份：");

scanf("%d%d",&year,&month);

if((year%400==0)||(year%4==0&&year%100!=0))

if(month==2) days=29;

          else  if(month==4||month==6||month==9||month==11)   days=30;

              else days=31;

  printf("%d年是闰年，%d月是%d天\n",year,month,days);

  if(month==2)  days=28; 

           else  if(month==4||month==6||month==9||month==11)   days=30;

    else  days=31;

printf("%d年不是闰年，%d月是%d天\n",year,month,days);

}