#include<bits/stdc++.h>
using namespace std;
int main()
{
	int a,b;
    cin>>a>>b; 
    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 if(a%4==0 && a%100!=0 || a%400==0) cout<<"29";
    else cout<<"28";
	return 0;
}