#include <iostream>
using namespace std;

bool isLeapYear(int year) {
    if (year % 400 == 0) return true;
    if (year % 100 == 0) return false;
    if (year % 4 == 0) return true;
    return false;
}

int main() {
    int year, month;
    cin >> year >> month;

    int days = 0;

    if (month == 2) {
        if (isLeapYear(year)) {
            days = 29;
        } else {
            days = 28;
        }
    } else if (month == 4 || month == 6 || month == 9 || month == 11) {
        days = 30;
    } else {
        // 其他月份：1,3,5,7,8,10,12 → 都是31天
        days = 31;
    }

    cout << days << endl;

    return 0;
}