n,k = map(int,input().split())
a = [int(x) for x in input().split()]
num = set()

def prd(a):
  i = 1
  for j in a:
    i *= j
  return i

for i in range(2**n):
  p = []
  for j in range(n):
    p.append((i>>j)%2)
  if sum(p)>=k:
    b = [ a[x] for x in range(n) if p[x]==1]
    num.add(sum(b))
    num.add(prd(b))
    #print(num)

print(len(num))
#print(num)