(defvar N)
(defvar x)
(setq n (parse-integer (read-line)))
(setq x (read-from-string (concatenate 'string "(" (read-line) ")")))

(defparameter gu 0)
(defparameter ki 0)
(loop for i in  x do
 (if (evenp i) (incf gu) (incf ki))
)
;(print gu)
;(print ki)
(format t "~d~%" (abs (- gu ki)))