import itertools

n, k = map(int, input().split())
A = list(map(int, input().split()))

ans = []
for i in itertools.combinations(A, k):
    t = sum(list(i))
    a = t % 998
    b = t % 998244353
    if a >= b:
        ans.append(1)

print(sum(ans) % 998)