from itertools import combinations
n,k=map(int,input().split())
s=list(map(int,input().split()))
A=[]
for i in range(n):
  A.append(i)
box=list(combinations(A,k))
ans=0
for i in range(len(box)):
  hako=box[i]
  count=0
  for ipp in range(k):
    count+=s[hako[ipp]]
  if count%998244353<=count%998:
    ans+=1
print(ans%998)