题解 | #小乐乐定闹钟#

#include <stdio.h>

int main() {
    int hour, minute,k;
    scanf("%d:%d %d", &hour, &minute,&k);
    hour=hour+1+(k+minute-60)/60;
    hour=hour%24;
    minute=(k+minute-60)%60;
    printf("%02d:%02d\n", hour,minute);
    return 0;
}