import times, strutils, sequtils, math, algorithm, tables, sets, lists, intsets
import critbits, future, strformat, deques
template `max=`(x,y) = x = max(x,y)
template `min=`(x,y) = x = min(x,y)
template `mod=`(x,y) = x = x mod y
template scan2 = (scan(), scan())
template scan3 = (scan(), scan())
let read* = iterator: string {.closure.} =
    while true: (for s in stdin.readLine.split: yield s)
proc scan(): int = read().parseInt
proc scanf(): float = read().parseFloat
proc toInt(c:char): int =
    return int(c) - int('0')




proc solve():int=
  var d = scan()
  result = int.high.div(4)

  proc f(x,k:int):int=
    var x = x
    for i in 0..<k:
      result += x
      x = x shr 1
    return

  proc binSearch(l,r,k:int,v:int):int=
    if l+1==r:
      return l
    else:
      var
        mid = (l+r).div(2)
      if f(mid,k)>v:
        return binSearch(l,mid,k,v)
      else:
        return binSearch(mid,r,k,v)
  for k in 1..<64:
    var res = binSearch(1,10^18,k,d)
    if f(res,k)==d:
      result.min=res


  




echo solve()