fun main(args: Array<String>) {
  var N = readLine()!!.toInt()
  val es:MutableList<Int> = mutableListOf()
  if( N == 0 ) es.add(0)
  while( N != 0 ) {
    val k = N%7
    es.add(k)
    N /= 7
  }
  println(es.asReversed().joinToString(""))
}