#include <stdio.h> int main() { int hour,minutr,t,T,k; scanf("%d:%d %d",&hour,&minutr,&k); T=k/60; t=k%60; if(minutr+t>=60) hour=hour+1; hour+T,minutr+t; printf("%02d:%02d",(hour+T)%24,(minutr+t)%60); return 0; }
