#include <iostream>
using namespace std;
int main() {
	int a, b;
	cin >> a >> b;
	if (a % 400 == 0 || a % 100 != 0 && a % 4 == 0) {
		if (b == 2) {
			cout << 29;
		} else if (b == 1 || b == 3 || b == 5 || b == 7 || b == 8 || b == 10 || b == 21) {
			cout << 31;
		} else {
			cout << 30;
		}
	} else {
		if (b == 2) {
			cout << 28;
		} else if (b == 1 || b == 3 || b == 5 || b == 7 || b == 8 || b == 10 || b == 21) {
			cout << 31;
		} else {
			cout << 30;
		}
	}
}