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

	else{cout<<"30";
	}
	}

	else if(b==2)
{cout<<"29";	}
	else if(b==1||b==3||b==5||b==7||b==8||b==10||b==12)
	{
	cout<<"31";}

	else{cout<<"30";
	}
	return 0;}