#include <iostream>
#include <iomanip>
using namespace std;

int main() {
	int a, b;
	cin >> a >> b;

	if (b == 2) {
		if (a % 4 == 0 && a % 100 != 0 || a % 400 == 0) {
			cout << 29;
		} else {
			cout << 28;
		}
	} else if (b == 1 || b == 3 || b == 5 || b == 7 || b == 8 || b == 10 || b == 12) {
		cout << 31;
	} else {
		cout << 30;
	}
}