#include <stdio.h>
#include <math.h>

int main(void){
  double a = 0;
  double time = 0.00;
  double seisuu = 0.00;
  double hour = 0.00;
  double syosuu = 0.00;
  double minitue = 0.00;

  double hoge = 0.00;
  double tmp = 0.00;


  scanf("%lf", &a);

  time = (a/100) + 10;


  syosuu = modf(time, &hour);

  minitue = syosuu * 60.0;

  if(minitue<10)
    printf("%d:0%d\n",(int)hour,(int)minitue + 1);
  else
    printf("%d:%d\n",(int)hour,(int)minitue + 1);

  return 0;
}