from itertools import combinations


N, K = map(int, input().split())
A = list(map(int, input().split()))
M1 = 998
M2 = 998244353
ans = 0

for chosen in combinations(A, K):
    tmp1 = 0
    tmp2 = 0
    for a in chosen:
        tmp1 += a
        tmp1 %= M1
        tmp2 += a
        tmp2 %= M2
    if tmp1 >= tmp2:
        ans += 1
        ans %= M1

print(ans)