import Data.Array
type Board = Array Int Int
main = do
  n <- read <$> getLine :: IO Int
  putStrLn $ show $ calcMinDist n

updateBoard :: ([Int],Board) -> ([Int],Board)
updateBoard ([],b) = ([],b)
updateBoard (is,b) = 
  (is',(b//if b!i'<0 then [] else prev ++ next))
  where
    (_,n) = bounds b
    numOfOne = sum . map (`mod`2) . takeWhile (>0) . iterate (`div`2)
    pr = i' - numOfOne i'
    nx = i' + numOfOne i'
    prev = if pr<1 || (b!pr>0&&b!pr<b!i'+1) then [] else [(pr,b!i'+1)]
    next = if nx>n || (b!nx>0&&b!nx<b!i'+1) then [] else [(nx,b!i'+1)]
    (i',is') = findMinDistInd is
    findMinDistInd [i] = (i,[])
    findMinDistInd (i:is) =
      let (i',is') = findMinDistInd is in
        if b!i'<0 || (b!i>=0 && b!i<=b!i') then (i,i':is') else (i',i:is')

calcMinDist :: Int -> Int
calcMinDist n =
  snd (iterate updateBoard ([1..n],board)!!(n+1)) ! n
  where
    board = listArray (1,n) $ 1:repeat (-1)