#| BEGIN (Введите свое решение) |#
(define (square x)
  (* x x))

(define (divides? a b)
  (= (remainder b a) 0))

(define (next d)
  (if (= d 2) 3
      (+ d 2)))

(define (smallest-divisor n)
  (define (find-divisor test-divisor)
    (cond ((> (square test-divisor) n) n)
          ((divides? test-divisor n) test-divisor)
          (else (find-divisor (next test-divisor)))))
  (find-divisor 2))
#| END |#