#include <stdio.h> int main() { int hour = 0; int minute = 0; int hour1 = 0; int minute1 = 0; int k = 0; scanf("%d:%d %d", &hour, &minute, &k); hour1 = (hour + (k + minute) / 60) % 24; minute1 = (minute + k) % 60; printf("%02d:%02d", hour1, minute1); return 0; }