n, w = map(int, input().split())
a = list(map(int, input().split()))
a.sort(reverse = True)
ans = 0
for i in range(1, 1 << n):
    b = []
    for j in range(n):
        if i >> j & 1:
            b.append(a[j])
    s = sum(b)
    f = 0
    for j in range(len(b)):
        if s - b[j] // 2 == w:
            f = 1
    if s == w:
        f = 1
    ans += f

print(ans)