(define (cb-tree l r)
  (reverse
   (let helper ([l l]
                [r r]
                [ls '()])
     (let ([m (quotient (+ l r) 2)])
       (cond [(= l r) (cons m ls)]
             [else (helper (+ m 1) r (helper l (- m 1) (cons m ls)))])))))

(define (main args)
  (let ([k (read)])
    (print
     (let* ([cbt (cb-tree 1 (- (expt 2 k) 1))]
            [pcbt (cons (cadr cbt) (cons (car cbt) (cddr cbt)))])
       (string-join (map number->string pcbt) " "))))
  0)