from itertools import combinations

mod1 = 998
mod2 = 998244353

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

ans = 0
for v in combinations(range(n), k):
    s1 = 0
    s2 = 0
    for i in v:
        s1 += a[i]
        s1 %= mod1
        s2 += a[i]
        s2 %= mod2
    if s2 <= s1:
        ans += 1
        ans %= mod1

print(ans)