from itertools import combinations

N, K = map(int, input().split())
A = list(map(int, input().split()))

M1 = 998
M2 = 998_244_353

ans = 0

for comb in combinations(A, K):
    s = sum(comb)

    if s % M1 >= s % M2:
        ans += 1

        if ans == M1:
            ans = 0

print(ans % M1)