try:
  from icecream import ic
except:
  pass

def minuteToTime(n):
  return f"{str(n//60).zfill(2)}:{str(n%60).zfill(2)}"

def main():
  a=int(input())
  print(minuteToTime(60*10+a*60//100))
  
if __name__=="__main__":
  main()