open System
type Sol() =
    member this.Solve() = 
        let N = int64 (Console.ReadLine())
        let rec f (x:int64) =
            if x = 0L then 0L
            else x + f (x/2L)
        N*2L - f N |> printfn "%d"

let mySol = new Sol()
mySol.Solve()