int com(int y,int m)
{
int d;
switch (m)
{
int d;
case 1:
case 3:
case 5:
case 7:
case 8:
case 10:
case 12: d = 31; break;
case 4:
case 6:
case 9:
case 11:d = 30; break;
case 2:
if ((y % 4 == 0 && y % 100 != 0) || (y % 400 == 0))
d = 29;
else
d = 28;
break;
}
return d;
}
void main()//给定年数和月份,判断该月对于应的天数,闰年的话2月为29天,平年为28天
{
int y,m, d;
scanf("%d%d", &y, &m);
d= com(y, m);
printf("%d\n", d);
}