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

import itertools
lst = itertools.combinations(range(N), K)
cnt = 0
for v in lst:
    S = 0
    for i in range(K):
        S += A[v[i]]
    if S%998 >= S%998244353:
        cnt += 1
print(cnt%998)