tht/C/TP-2018/guess.scm


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(with-input-from-file "GUESS.INP"
  (lambda ()
    (with-output-to-file "GUESS.OUT"
      (lambda ()
        (let* ((a (read))
               (b (read)))
          (display ((list-ref (list + - *) (random 3)) a b))
          (newline))))))