(define (System.out.println x)
  (begin
    (display x)
    (newline)
  )
)

(define (CntBin1 foo)
  (if (<= foo 2)
      1
      (if (= (modulo foo 2) 0)
          (CntBin1 (/ foo 2))
          (+ 1 (CntBin1 (/ (- foo 1) 2)))
      )
  )
)

(let (
      (N (read))
     )
  (let loop(
            (i 1)
            (Grid 1)
           )
    (if (= Grid N)
        (System.out.println i)
        (if (<= (+ Grid (CntBin1 Grid)) N)
            (loop (+ i 1) (+ Grid (CntBin1 Grid)))
            (if (>= i N)
                (System.out.println -1)
                (loop (+ i 1) (- Grid (CntBin1 Grid)))
            )
        )
    )
  )
)