import itertools

n, k = map(int,input().split())
a = list(map(int,input().split()))
ans = 0
lisn = [i for i in range(0,n)]
com = list(itertools.combinations(lisn,k))

for val in com:
    s = 0
    for i in range(len(val)):
        s+=a[val[i]]
    if s%998244353<=s%998:
        ans += 1
print(ans%998)