import itertools

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

l = [ i for i in range(N) ]
product = itertools.combinations(l, K)
ans = 0
for p in product:
    #print(p)
    s = 0
    for i in p:
        s += A[i]
    if s%998244353 <= s%998:
        ans += 1
    ans %= 998
ans %= 998
print(ans)