(defun main (&rest argv)
  (declare (ignorable argv))
  (let* ((n (read))
         (x (loop repeat n collect (read)))
         (p 0)
         (q 0))
    (dolist (i x)
      (if (evenp i)
          (incf p)
          (incf q)))
    (format t "~d~%" (abs (- p q)))))

(main)