(defconstant +mod+ 1000000007)

(defun main (&rest argv)
  (declare (ignorable argv))
  (let* ((n (read))
         (m (if (> n 4) 4 (1- n)))
         (dp (make-array (list 5 5) :initial-contents '((0 0 0 0 0)
                                                        (1 0 1 2 0)
                                                        (0 1 1 0 0)
                                                        (0 0 1 1 0)
                                                        (0 0 0 0 0)))))
    (loop for i from 5 to n do
          (setf (aref dp 1 4) (mod (+ (aref dp 2 3) (aref dp 3 3)) +mod+)
                (aref dp 2 4) (mod (+ (aref dp 1 2) (aref dp 3 2)) +mod+)
                (aref dp 3 4) (mod (+ (aref dp 1 1) (aref dp 2 1)) +mod+))
          (loop for j from 1 to 3 do
                (setf (aref dp j 1) (aref dp j 2)
                      (aref dp j 2) (aref dp j 3)
                      (aref dp j 3) (aref dp j 4))))
    (format t "~d~%" (mod (+ (aref dp 1 m)
                             (aref dp 2 m)
                             (aref dp 3 m)) +mod+))))

(main)