#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";}
		
	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";}
		
	if(b==1||b==3||b==5||b==7||b==8||b==10||b==12)
	{
	cout<<"31";}
	else{cout<<"30";
	}}
	return 0;
	}