# 非再帰BFS (K個目はqに入れずにそのまま判定)
from collections import deque

N,K = map(int,input().split())
assert 1 <= N <= 28
assert 1 <= K <= min(8,N)
A = list(map(int,input().split()))
for a in A:
    assert 0 <= a <= 998244352
ans = 0
# [i,l,s]: i個選んだ，今まで選んだ数字のうち一番後ろのindexはl，和はs
q = deque([[0,-1,0]])
while q:
    i,l,s = q.popleft()
    for j in range(l+1,N-K+1+i):
        if i == K-1:
            if (s+A[j]) % 998244353 <= (s+A[j]) % 998:
                ans += 1
        else:
            q.append([i+1,j,s+A[j]])
print(ans % 998)