import strutils, sequtils, algorithm, future

{.warning[SmallLshouldNotBeUsed]: off.}

when isMainModule:
  var
    n = stdin.readLine.parseInt
    ans = ""

  if n == 0:
    echo 0
    quit()

  while n != 0:
    ans = $(n mod 7) & ans
    n = n div 7

  echo ans