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(define (cau1 n i)
(cond ((> (* i i) n) 0)
((= (* i i) n) 1)
((= (remainder n i) 0) (+ (cau1 n (+ i 1)) 2))
(else (cau1 n (+ i 1)))))
(with-input-from-file "CAU1.INP" (lambda ()
(with-output-to-file "CAU1.OUT" (lambda ()
(format #t "~a\n" (cau1 (read) 1))))))
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