n,w = map(int,input().split())
a = list(map(int,input().split()))
a2 = [i//2 for i in a]
cnt=0          

for bit in range(1,1<<n):
    li = []
    for j in range(n):
        if (bit>>j)&1==1:
            li.append(j)
    l = len(li)
    for j in range(1<<l):
        ka = 0
        for k in range(l):
            if (j>>k)&1==1:
                ka+= a2[li[k]]
            else:
                ka+= a[li[k]]
        if ka==w:
            cnt+=1
            break
print(cnt)