(defun main (&rest argv)
  (declare (ignorable argv))
  (let* ((*read-default-float-format* 'double-float)
         (n (read))
         (a 0)
         (b 0)
         (res 0))
    (dotimes (_ n)
      (let* ((x (read)))
        (cond ((= x a) (setf res (1+ res)
                             b 1))
              ((not (zerop b)) (setf b 0))
              (t (setf res (1+ res)
                       b 1)))
        (setq a x)))
    (format t "~d~%" res)))

(main)