#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;
}