N,K=map(int,input().split())
P=list(map(int,input().split()))
L=[i for i in range(N)]
from itertools import combinations
result=0
for A in combinations(L,K):
  a=0
  b=0
  for i in range(K):
    a+=P[A[i]]
    b+=P[A[i]]
  a%=998244353
  b%=998
  if b>=a:
    result+=1
result%=998
print(result)