题解 | #小乐乐定闹钟#

#include <stdio.h>

int main() 
{
    int hour,minute = 0;
    scanf("%d:%d ",&hour,&minute);
    int k = 0;
    scanf("%d",&k);
    if((k/60+hour)>=24 && (minute+k%60) >= 60)
    {
    printf("%02d:%02d",((hour+k/60)%24+(minute+k%60)/60)%24,(k%60+minute)%60);
    }
    else 
    {
        printf("%02d:%02d",(k/60+hour)%24,k%60+minute);
    }
    return 0;
}