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 Scala (judge verdict: Accepted)

import scala.io.StdIn.readInt
object Main {
    def main(args: Array[String]) = {
        val a = readInt()
        println(watch(a))
    }
    def div(a: Int, b: Int): (Int, Int) = (a / b, a % b)
    def watch(sec: Int): String = {
        val a = div(sec, 3600)
        val b = div(a._2, 60)
        return s"${a._1}:${b._1}:${b._2}"
    }
}