题解 | #小乐乐定闹钟#

#include <stdio.h>

int main() {
    int hour = 0;
    int minute = 0;
    int hour1 = 0;
    int minute1 = 0;
    int k = 0;

    scanf("%d:%d %d", &hour, &minute, &k);
    hour1 = (hour + (k + minute) / 60) % 24;
    minute1 = (minute + k) % 60;

    printf("%02d:%02d", hour1, minute1);
    return 0;
}