(defconstant +mod+ 1000000007)

(defun main (&rest argv)
  (declare (ignorable argv))
  (let* ((n (read))
         (l (read))
         (r (read))
         (dp (make-array (list 100001 64) :element-type 'integer))
         (m 1)
         (res 0))
    (setf (aref dp 0 0) 1)
    (loop for i from 1 below n do
          (setq m (mod (* m i) +mod+))
          (dotimes (j 64)
            (setf (aref dp i j) (mod (+ (* (aref dp (1- i) j) (1- i))
                                        (if (>= j 1)
                                            (aref dp (1- i) (1- j))
                                            0)) +mod+))))
    (dotimes (i 64)
      (when (and (<= l (ash 1 i)) (<= (ash 1 i) r))
            (setq res (mod (+ res (aref dp (1- n) i)) +mod+))))
    (when (zerop l)
          (setq res (mod (+ res (* m (1- n))) +mod+)))
    (format t "~d~%" res)))

(main)