#include <bits/stdc++.h>
using namespace std;

int main() {
	int n,m;
	cin>>n>>m;
	 if (m == 1 || m == 3 || m == 5 || m == 7 || m == 8 || m == 10 || m == 12)
    { 
        cout << "31";
    }
    if (n % 400 == 0 || (n % 4 == 0 && n % 100 != 0))
    {
    cout << "29";
    }
   else
   { 
    cout << "28";
   }
	return 0;
}