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 C# (judge verdict: Accepted)

using System;

class Watch
{
    public static void Main()
    {
        String str = Console.ReadLine();
        int a = int.Parse(str);
        int hour = a / 3600;
        int minute = (a - (hour * 3600)) / 60;
        int second = a - (hour * 3600) - (minute * 60);
        Console.WriteLine("{0}:{1}:{2}", hour, minute, second);
    }
}