include

using namespace std;

int main() {

int year, month;
cin >> year >> month;
int month_days[] = {0, 31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31};
if (month == 2) {
    if ((year % 400 == 0) || (year % 4 == 0 && year % 100 != 0)) {
        cout << 29 << endl;
    } else {
        cout << 28 << endl;
    }
} else {
    cout << month_days[month] << endl;
}

return 0;

}