N,K = map(int,input().split())
A = list(map(int,input().split()))
MOD = 998244353
M = 998

from itertools import combinations

ans = 0
for ptn in combinations(A,K):
    s1 = sum(ptn) % MOD
    s2 = sum(ptn) % M
    if s1 <= s2:
        ans += 1
print(ans%M)