# 再帰DFS (pypyの再帰高速化なし)
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
def dfs(i,l,s):
    global ans
    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:
            dfs(i+1,j,s+A[j])
dfs(0,-1,0)
print(ans % 998)