from itertools import combinations
mod = 998
MOD = 998244353

n, m = map(int, input().split())
a = list(map(int, input().split()))

b = [x % mod for x in a]
c = [x % MOD for x in a]
ans = 0
for tup in combinations([*range(n)], m):
	s1 = sum([b[k] for k in tup]) % mod
	s2 = sum([c[k] for k in tup]) % MOD
	if(s1 >= s2):
		ans += 1
print(ans % mod)