Problem:
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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.

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: Wrong Answer)

watch = Time.at(gets.to_i)

hour = watch.strftime("%H").to_i.to_s
min  = watch.strftime("%M").to_i.to_s
sec  = watch.strftime("%S").to_i.to_s

puts "#{hour}:#{min}:#{sec}"