(defun main (&rest argv)
  (declare (ignorable argv))
  (let* ((m (read))
         (n (read))
         (c (read)))
    (declare (ignore c))
    (format t "~a~%" (cond ((and (oddp n) (oddp m))
                             "NO")
                           ((or (and (= n 1) (= m 2))
                                (and (= n 2) (= m 1)))
                             "YES")
                           ((or (= n 1)
                                (= m 1))
                             "NO")
                           (t
                             "YES")))))

(main)