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: Accepted)

<?php
$in = fgets(STDIN);
$m = ($in / 60 < 0) ? 0 : (int)($in / 60);
$s = $in % 60;
$h = floor($m / 60);
$m = $m % 60;
echo $h . ':' . $m . ':' . $s;
?>