import itertools

N,K = map(int, input().split())
A = list(map(int, input().split()))
l = [i for i in range(1,N+1)]
S = 0
S1 = 0
S2 = 0
ans = 0
for v in itertools.combinations(l,K):
    S = 0
    for s in v:
        S += A[s-1]
    S1 = S % 998
    S2 = S % 998244353
    if S1 >= S2:
        ans += 1
print(ans % 998)