#include<iostream>
#include<cstdio>
using namespace std;
int main()
{
	long long n,y;
	cin>>n>>y;
	if(y==1||y==3||y==5||y==7||y==8||y==10||y==12)
	{
		cout<<31;
	}
	else if(y==4||y==6||y==9||y==11)
	{
		cout<<30;
	}
	else if(n%100==0||n%1000==0&&y==2)
	{
		cout<<29;
	}
	else if(n%100!=0||n%1000!=0&&y==2)
	{
		cout<<28;
	}
    return 0;
}