import itertools as it
n,k= map(int,input().split())
a= list(map(int,input().split()))
ans= 0
num= list(it.combinations(a,k))
for i in range(len(num)):
  x= sum(num[i])
  if (x % 998244353) <= (x % 998):
    ans += 1
print(ans % 998)