Problem:
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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.

Input

An integer $S$ is given in a line.

Output

Print $h$, $m$ and $s$ separated by ':'. You do not need to put '0' for a value, which consists of a digit.

Constraints

$0 \leq S \leq 86400$

Sample Input 1

46979

Sample Output 1

13:2:59

Solution in Ruby (judge verdict: Accepted)

def to_time(i)
  h = (i / 3_600).to_i
  m = (i - (h * 3_600)) / 60.to_i
  s = (i - h * 3_600 - m * 60) % 3_600
  "#{h}:#{m}:#{s}"
end

s = gets.chomp.to_i
puts to_time(s)