#include<stdio.h>
int main()
{
int y,m,d,a;
scanf("%d%d",&y,&m);
a=y%4==0&&y%100!=0||y%400==0;
switch(m)
{
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:d=28+a;break;
}
printf("%d\n",d);
return 0;
}