题解 | #获得月份天数#

#include <iostream>
using namespace std;

int main() {
	int year = 0;
	int month[12] = { 31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31 };
	int mon = 0;
	int day = 0;

	while (cin>>year>>mon) {
		if ((year % 4 == 0 && year % 100 != 0) || year % 400 == 0) {
			if (mon == 2) {
				cout << "29" << endl;
				
			}
			else {
				cout << month[mon-1] << endl;
			}
		}
		else {
			cout << month[mon-1] << endl;
		}
	}


	system("pause");
	return 0;
 }