(defun main (&rest argv)
  (declare (ignorable argv))
  (let* ((a (read))
         (b (read))
         (c (read)))
    (cond ((or (= a b) (= b c) (= c a))
            (format t "0~%"))
          ((or (and (< b a) (< b c)) (and (> b a) (> b c)))
            (format t "INF~%"))
          (t
            (let ((ans 0))
              (loop for i from 2 to (max a c) do
                    (let ((p (mod a i))
                          (q (mod b i))
                          (r (mod c i)))
                      (when (and (/= p r) (or (and (< q p) (< q r)) (and (> q p) (> q r))))
                            (incf ans))))
              (format t "~d~%" ans))))))

(main)