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

(defun dfs (a b c d arr res)
  (when (zerop c)
        (when (<= (mod d +mod9982+) (mod d +mod998+))
              (incf res)))
  (when (< a b)
        (incf d (aref arr a))
        (dfs (1+ a) b (1- c) d arr res)
        (decf d (aref arr a))
        (dfs (1+ a) b c d arr res)))

(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)))
    (dfs 0 n k 0 a res)
    (format t "~d~%" res)))

(main)