题解 | #获得月份天数#

#include <stdio.h>

int main() {
    int year, month = 0;
    int days[12] = {31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31};
    while (scanf("%d %d", &year, &month) != EOF) {
        int day = days[month - 1];
        if ((year % 4 == 0 && year % 100 != 0) || (year % 100 == 0)) {
            if (month == 2)
                day++;
        }
        printf("%d\n", day);
    }
    return 0;
}