#include<iostream>

using namespace std;
typedef unsigned long long ull;
int main()
{
	ull y,m;
	cin >>y>>m;
	if(y % 400 == 0 || (y % 4 == 0 && y % 100 != 0))
	{
		if(m==1||m==3||m==5||m==7||m==8||m==12) cout<<31;
		else if(m==2) cout<<29;
		else cout<<30;
	}else{
		if(m==1||m==3||m==5||m==7||m==8||m==12) cout<<31;
		else if(m==2) cout<<28;
		else cout<<30;
	}
}