#include <stdio.h>
int main()
{
int k,hour,minute;
scanf("%d:%d %d",&hour,&minute,&k);
int h,m,sum;
h=((k+minute)/60)+hour;
m=(k+minute)%60;
while(h>23)
{
if(h>23)
{
h=h-24;
}
}
printf("%.2d:%.2d",h,m);
return 0;
}

京公网安备 11010502036488号