Код Ревью
Сравни свои решения
(define (smooth stream)
(stream-map (lambda (a0 a1) (/ (+ a0 a1) 2)) stream (stream-cdr stream)))
(define (smooth stream)
(stream-map (lambda (a0 a1) (/ (+ a0 a1) 2)) stream (stream-cdr stream)))