using namespace std;
int main()
{
	int a,b;
	cin>>a>>b;
	if(b==1||b==3||b==5||b==7||b==7||b==8||b==10||b==12)
	cout<<"31";
	else if(b==2)
	{
		if(a%400==0||a%100!=0&&a%4==0)
		cout<<"29";
		else
		cout<<"28";
	}
	else
	cout<<"30";
	return 0;
}