题解 | #小乐乐定闹钟#

#include <stdio.h>

int main() {
    int hour, minute,k;
    while (scanf("%d:%d %d", &hour, &minute,&k) != EOF) { // 注意 while 处理多个 case
        // 64 位输出请用 printf("%lld") to 
        minute = minute + k%60;

        hour = hour + k/60;
        hour = hour %24;

        if(minute>60)
        {
            minute = minute - 60;
            hour = hour +1;
        }
        
        printf("%02d:%02d", hour, minute);
    }
    return 0;
}