(defun powmod (base n &optional mo)
  (labels ((rec (b e m)
             (cond
               ((= e 0) 1)
               ((evenp e)
                (let ((half (rec b (/ e 2) m)))
                  (if m
                      (mod (* half half) m)
                      (* half half))))
               (t
                (let ((half (rec b (/ (1- e) 2) m)))
                  (if m
                      (mod (* b (mod (* half half) m)) m)
                      (* b (* half half))))))))
    (rec base n mo)))

(defun main (&rest argv)
  (declare (ignorable argv))
  (let* ((x (read))
         (n (read))
         (a (loop repeat n collect (read)))
         (m 1000003))
    (princ (mod (reduce #'+ (map 'list (lambda (f) (powmod x f m)) a)) m))
    (terpri)))

(main)