#include<iostream>
#include<cmath>
using namespace std;
int main()
{
int y,m,leap;
cin>>y>>m;
if(y%400==0||y%4==0&&y%100!=0)
leap=1;
else
leap=0;
if(m==2)
cout<<28+leap<<endl;
else
if(m==4||m==6||m==9||m==11)
cout<<30<<endl;
else
cout<<31<<endl;
return 0;
}