(define n (string->number (read-line)))
(define as (sort (map string->number (string-split (read-line) " "))))

(print (cond ((zero? (mod n 2))
              (let* ((ptr (/ n 2))
                     (a (ref as (- ptr 1)))
                     (b (ref as ptr)))
               (/ (+ a b) 2)))
             (else (ref as (- (ceiling (/ n 2)) 1)))))