from itertools import combinations
MOD1 = 998
MOD2 = 998244353
N,K = list(map(int,input().split()))
A = list(map(int,input().split()))

ans = 0
for i in combinations(A,K):
    S = sum(i)
    ans += S % MOD1 >= S % MOD2
print(ans%MOD1)