#include<bits/stdc++.h>
using namespace std;
int n,y;
int main()
{
    cin>>n>>y;
    if(y==1 || y==3 || y==5 || y==7 || y==8 || y==10 || y==12) cout<<"31";
    if(y==4 || y==6 || y==9 || y==11) cout<<"30";
    if(n%4!=0) 
    {
    	if(y==2) cout<<"28";
	}
    else
	{
        cout<<"29";
	} 
	
    return 0;
}