object Main {
   def main (args: Array[String]) {
     val S: Int = scala.io.StdIn.readLine().toInt
     val h = S / 3600
     val m = (S - h * 3600) / 60
     val s = (S - h * 3600 - m * 60)
     println( h + ":" + m + ":" + s);
  }
}