#include <bits/stdc++.h>
using namespace std;
int main() {
int y, m;
cin >> y >> m;
if (m == 2)
if (y % 4 == 0 && y % 100 != 0 || y % 400 == 0)
cout << 29;
else
cout << 28;
else if (m == 4 || m == 6 || m == 9 || m == 11)
cout << 30;
else
cout << 31;
return 0;
}