from itertools import combinations
N,K = map(int,input().split())
A = list(map(int,input().split()))
MOD1 = 998
MOD2 = 998244353
cnt = 0
for z in combinations(A,K):
    a = sum(z)
    a1 = a%MOD1
    a2 = a%MOD2
    if a1>=a2:
        cnt += 1
print(cnt%MOD1)