from itertools import combinations


def main():
    N, K = map(int, input().split())
    A = list(map(int, input().split()))
    ctr = 0
    for idxs in combinations(range(N), r=K):
        S = sum(A[idx] for idx in idxs)
        if S % 998 >= S % 998244353:
            ctr += 1
    print(ctr % 998)


if __name__ == "__main__":
    main()