output_description: Print $h$, $m$ and $s$ separated by ':'. You do not need to put '0' for a
  value, which consists of a digit.
input_description: An integer $S$ is given in a line.
attempt: A = int(input())
  print(A / 3600, ":", (A % 3600) / 60, ":", A % 60)
  
problem_description: Watch
  
  Write a program which reads an integer $S$ [second] and converts it to $h:m:s$
  where $h$, $m$, $s$ denote hours, minutes (less than 60) and seconds (less
  than 60) respectively.
samples: [{"input": "46979", "output": "13:2:59"}]