open System

let isOdd n = (n &&& 1) = 1
let op1 n = n+1
let op2 n = n/2

let N = Console.ReadLine() |> int

let rec f n cnt =
    match n with 
    | 1 -> cnt
    | x -> 
        if isOdd x then 
            f (op1 x) (cnt+1)
        else
            f (op2 x) (cnt+1)                                

f N 0
|> printfn "%i"