题解 | #获得月份天数#

import java.util.Scanner;
public class Main{
    public static void main(String[] args) {
        Scanner scan = new Scanner(System.in);
        int[] days = { 31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31};//平年每个月的天数表
        while(scan.hasNextInt()) {
            int year = scan.nextInt();
            int month = scan.nextInt();
            int day = days[month - 1];
            if(((year % 400 == 0) || (year % 100 != 0 && year % 4 == 0)) && month == 2) {//对于闰年的二月，需要加1
                day += 1;
            }
            System.out.println(day);
        }
    }
}