from collections import defaultdict
H = defaultdict(lambda: 0)
H[0] = 1
def inpl(): return [int(i) for i in input().split()]
N, A = inpl()
x = inpl()
x = [i-A for i in x]
H[0]= 1
for i in x:
    for ni,nv in H.copy().items():
        H[ni+i] += nv
print(H[0]-1)