object Main {
   def main (args: Array[String]) {
     val input:Int = scala.io.StdIn.readInt();
     val hour:Int  = input/(60*60)
     val min:Int   = (input / 60 * 60) % 60
     val sec:Int   = input % 60
     println( hour + ":" + min + ":" + sec );
  }
}