题解 | #打印日期#

#include <stdio.h>
#include <stdbool.h>
bool IsRunYear(int year)
{
    return (year % 4 == 0 && year % 100 != 0) || (year % 400 == 0);
}
int table[2][13] = {
    {0, 31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31},
    {0, 31, 29, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31}
};
int main() {
    int year, month, day;
    int number;
    while (scanf("%d%d", & year, & number) != EOF) {
        month = 0;
        int row = IsRunYear(year);
        while (number > table[row][month]) {
            number -= table[row][month];
            month++;
        }
        day = number;
        printf("%d-%02d-%02d", year, month, day);
    }
    return 0;
}