import sys
input = lambda: sys.stdin.readline()[:-1]

import itertools

n, k = map(int, input().split())
a = tuple(map(int, input().split()))

ans = 0
for i in itertools.combinations(a, k):
    wa = sum(i)
    if wa%998244353 <= wa%998:
        ans += 1

print(ans%998)