(declaim (optimize (speed 3) (safety 0)))
(defun fib (n m)
  (labels ((rec (a b c p q)
    (cond
      ((zerop c)
        (mod b m))
      ((evenp c)
        (rec a b (floor c 2) (mod (+ (* p p) (* q q)) m) (mod (+ (* 2 p q) (* q q)) m)))
      (t
        (rec (mod (+ (* b q) (* a q) (* a p)) m) (mod (+ (* b p) (* a q)) m) (1- c) p q)))))
    (rec 1 0 n 0 1)))

(defun main (&rest argv)
  (declare (ignorable argv))
  (let* ((n (read))
         (m (read)))
    (format t "~D~%" (fib (1- n) m))))

(main)