题解 | #日期类#

#include<cstdio>
int main() {
    int Mday[13] = {0, 31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31};
    int n;
    scanf("%d", &n);
    for (int i = 0; i <= n; ++i) {
        int year, mon, day;
        while (scanf("%04d%02d%02d", &year, &mon, &day) != EOF) {
            ++day;
            if (day > Mday[mon]) {
                day = 1;
                ++mon;
                if (mon > 12) {
                    ++year;
                    mon = 1;
                }
            }
            printf("%04d-%02d-%02d\n", year, mon, day);
        }
    }
}