题解 | #小乐乐定闹钟#

#include <stdio.h>

int main() {
    int hour = 0,minute = 0,k = 0;
    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 
        if(0 <= hour && hour <= 23 && 0 <= minute && minute <= 59 && 1 <= k && k <= 10000000000)
        {
            hour += k/60;
            minute += k%60;

            while(minute > 60)
            {
                minute -= 60;
                hour += 1;
            }

            while(hour > 24)
            {
                hour -= 24;
            }

        }
        printf("%02d:%02d",hour,minute);
    }
    return 0;
}