from itertools import combinations
import sys
input = sys.stdin.readline

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

ans = 0
mod1 = 998
mod2 = 998244353
for C in combinations(range(n), k):
    res1, res2 = 0, 0
    for i in range(k):
        res1 += A[C[i]]
        res1 %= mod1
        res2 += A[C[i]]
        res2 %= mod2
    if res2 <= res1:
        ans += 1
        ans %= mod1
print(ans)