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;

namespace Watch
{
    class Watch
    {
        public static void Main()
        {
            int sec = int.Parse(Console.ReadLine());
            int h = sec / 3600;
            int m = (sec - h * 3600) / 60;
            int s = sec - 3600 * h - 60 * m;
            Console.WriteLine("{0}:{1}:{2}", h, m, s);
        }
    }
}