# combinationsで組み合わせを列挙
from itertools import combinations

def main():
    N,K = map(int,input().split())
    assert 1 <= N <= 28
    assert 1 <= K <= min(8,N)
    A = list(map(int,input().split()))
    for a in A:
        assert 0 <= a <= 998244352
    ans = 0
    for comb in combinations(A,K):
        sum_comb = sum(comb)
        if sum_comb % 998244353 <= sum_comb % 998:
            ans += 1
    print(ans % 998)
    
if __name__ == "__main__":
    main()