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 PHP (judge verdict: WA: Presentation Error)

<?php
date_default_timezone_set('UTC');
$input_lines = trim(fgets(STDIN));
$date = date('H:i:s',$input_lines);
$s = explode(":", $date);
$s[1] = preg_replace('/0/','',$s[1]);

echo $s[0].":".$s[1].":".$s[2];