from itertools import combinations
MOD_S = 998
MOD_L = 998244353

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

ans= 0
for comb in combinations(A,K):
    S = sum(comb)
    SS = S%MOD_S
    SL = S%MOD_L
    if SS >= SL:
        ans += 1
        ans %= MOD_S

print(ans)