from itertools import combinations

N, K = [int(x) for x in input().split()]
A = [int(x) for x in input().split()]

ans = 0
mod998 = 998
mod998244353 = 998244353

for comb in combinations(range(N), K):
    B = []
    for c in comb:
        B.append(A[c])
    suma = sum(B)
    s1 = suma % mod998
    s2 = suma % mod998244353
    if s1 >= s2:
        ans += 1
        ans %= mod998

print(ans)