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

ans = 0
for i in range(2**n):
    now = []
    cnt = 0
    for j in range(n):
        if (i>>j & 1 == 1):
            cnt += 1
            now.append(a[j])
    if len(now) != k:
        continue
    total = sum(now)
    if total%998244353 <= total%998:
        ans += 1
        ans %= 998
print(ans)