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 PHP (judge verdict: Wrong Answer)

<?php
// $a = trim(fgets(STDIN));
$a = 46979;

$h = floor($a / 3600);
$m = floor(($a - $h * 3600) / 60);
$s = floor($a - $h * 3600 - $m * 60);
echo($h . ":" . $m . ":" . $s);
?>