#include<bits/stdc++.h>
using namespace std;
int main()
{
	int a,b;
	cin>>a>>b;
    if(a%4==0&&a%100!=0||a%400==0)
	{
		if(b==1||b==3||b==5||b==7||b==8||b==10||b==12)
		{
            cout<<"31";
		}
		else if(b==4||b==6||b==9||b==11)
        {
			cout<<"30";
		}
        else
		{
			cout<<"29";
		}
	}
	else
	{
		if(b==1||b==3||b==5||b==7||b==8||b==10||b==12)
		{
            cout<<"31";
		}
		else if(b==4||b==6||b==9||b==11)
        {
			cout<<"30";
		}
        else
		{
			cout<<"28";
		}
	}
	return 0; 
}