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
$stdin = intval(trim(fgets(STDIN)));
$fm = floor($stdin/60);
$fh = floor($fm/60);
$fm = $fm - ($fh*60);
$fs = $stdin - ($fh*3600) - ($fm*60);
$time = "$fh:$fm:$fs";
echo $time;
?>