import scala.io.StdIn
 
object Main {
  def main(args: Array[String]){

    @annotation.tailrec
    def f(t: Int, r: Int, n: Int): (Int, Int) =
        if (r >= t) f(t, r - t, n + 1) else (n, r)
		
    val ss = StdIn.readLine().toInt
    val (hh, ss2) = f(3600, ss,  0)
    val (mm, ss3) = f(60,   ss2, 0)
    println(f"${hh}%d:${mm}%d:${ss3}%d")
  }
}
