Exercise 1.16 Fast exponentiation
swift

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    #| BEGIN (Введите свое решение) |#
(define (solution b n)
  (define (square x)
    (* x x))
  
  (define (fast-expt-iter a b n)
    (cond ((= n 0) a)
          ((even? n) (fast-expt-iter a (square b) (/ n 2)))
          (else (fast-expt-iter (* a b) b (- n 1)))))

  (fast-expt-iter 1 b n))
#| END |#

    #| BEGIN (Введите свое решение) |#
(define (solution b n)
  (define (square x)
    (* x x))
  
  (define (fast-expt-iter a b n)
    (cond ((= n 0) a)
          ((even? n) (fast-expt-iter a (square b) (/ n 2)))
          (else (fast-expt-iter (* a b) b (- n 1)))))

  (fast-expt-iter 1 b n))
#| END |#

    #| BEGIN (Введите свое решение) |#
(define (solution b n)
  (define (square x)
    (* x x))
  
  (define (fast-expt-iter a b n)
    (cond ((= n 0) a)
          ((even? n) (fast-expt-iter a (square b) (/ n 2)))
          (else (fast-expt-iter (* a b) b (- n 1)))))

  (fast-expt-iter 1 b n))
#| END |#

    #| BEGIN (Введите свое решение) |#
(define (solution b n)
  (define (square x)
    (* x x))
  
  (define (fast-expt-iter a b n)
    (cond ((= n 0) a)
          ((even? n) (fast-expt-iter a (square b) (/ n 2)))
          (else (fast-expt-iter (* a b) b (- n 1)))))

  (fast-expt-iter 1 b n))
#| END |#