(defconstant +mod998+ 998)
(defconstant +mod9982+ 998244353)

(defun main (&rest argv)
  (declare (ignorable argv))
  (let* ((n (read))
         (k (read))
         (a (make-array n))
         (res 0))
    (dotimes (i n) (setf (aref a i) (read)))
    (labels ((f (x y z)
                (when (= x k)
                      (when (<= (mod z +mod9982+) (mod z +mod998+))
                            (incf res)))
                (loop for i from (1+ y) below n do
                      (f (1+ x) i (+ z (aref a i))))))
      (f 0 -1 0))
    (format t "~d~%" (mod res +mod998+))))

(main)