N,K=map(int, input().split())
A=list(map(int, input().split()))

import itertools
B=itertools.combinations([i for i in range(N)],K)

ans=0
x,y=998244353,998
for b in B:
  c=0 
  for i in range(K):
    c+=A[b[i]]
  if c%x<=c%y:
    ans+=1 
    ans%=y 
print(ans)