from itertools import combinations
N,K=map(int,input().split())
A=list(map(int,input().split()))
L=[_ for _ in range(N)]
C=combinations(L,K)
ans=0
for c in C:
    s=0
    for i in range(K):
        s+=A[c[i]]
    if(s%998244353<=s%998):
        ans+=1
print(ans%998)