N,K = map(int,input().split())
A = list(map(int,input().split()))
B = set()
for i in range(1<<N):
    cnt = 0
    cum = 0
    prod = 1
    for k in range(N):
        if (i>>k) & 1:
            cnt += 1
            cum += A[k]
            prod *= A[k]
    if cnt>=K:
        B.add(cum)
        B.add(prod)
print(len(B))