#include <stdio.h>
main()
{
int year,month,days;
printf("请输入年，月：");
scanf("%d%d",&month,&year);
if(year%400==0||(year%4==0&&year%10!=0))
{
switch(month)
{
case 2:
days=29;
break;
case 4:case 6:case 9:case 11:
days=30;
break;
default:
days=31;
break;
}
}
else
{
switch(month)
{
case 2:
days=28;
break;
case 4:case 6:case 9:case 11:
days=30;
break;
default:
days=31;
break;
}
}
printf("%d天\n",days);
}
