// http://yukicoder.me/problems/11

open System
open System.Collections.Generic

let dprintfn fmt = Printf.kprintf Diagnostics.Debug.WriteLine fmt

let bitcount n =
    let rec loop bits num =
        if bits = 0 then num
        else loop (bits &&& (bits-1)) (num+1)
    loop n 0

let solve N =
    let visited = Array.init (N+1) (fun _ -> false)
    let q = new Queue<int*int>()
    q.Enqueue(1,1)
    let rec bfs () =
        if q.Count = 0 then -1 else
        let i, cnt = q.Dequeue()
        if i = N then cnt else
        visited.[i] <- true
        let n = bitcount i
        if i+n = N then cnt+1 else
        if i+n < N && not visited.[i+n] then
            q.Enqueue(i+n, cnt+1)
        if i-n >= 1 && not visited.[i-n] then
            q.Enqueue(i-n, cnt+1)
        bfs ()
    bfs ()

[<EntryPoint>]
let main argv = 
    let N = Console.ReadLine() |> int
    solve N
    |> printfn "%d" 
    0