from itertools import combinations

n,k = map(int,input().split())
a = list(map(int,input().split()))
c = list(combinations(a,k))

ans = 0
amod = 998244353
bmod = 998
for i in c:
    cnt1 = 0
    cnt2 = 0
    for j in i:
        cnt1 += j
        cnt2 += j
        cnt1 %= amod
        cnt2 %= bmod
    
    if cnt1 <= cnt2:
        ans += 1
        ans %= bmod

print(ans)