import sys
import bisect
n,w = map(int,input().split())
a = list(map(int,input().split()))
a2 = [i//2 for i in a]
cnt=0          
s = set(range(n))

for bit in range(1,1<<n):
    li = []
    for j in range(n):
        if (bit>>j)&1==1:
            li.append(j)
    l = len(li)
    if l==1:
        if a[li[0]]==w or a2[li[0]]==w:
            cnt+=1
        continue
    cri = l//2
    ll1 = []
    for j in range(1<<cri):
        ka = 0
        for k in range(cri):
            if (j>>k)&1==1:
                ka+= a2[li[k]]
            else:
                ka+= a[li[k]]
        ll1.append(ka)
    ll1.sort()

    ll2 = []
    for j in range(1<<(l-cri)):
        ka = 0
        for k in range(l-cri):
            if (j>>k)&1==1:
                ka+= a2[li[-1-k]]
            else:
                ka+= a[li[-1-k]]
        ll2.append(ka)
    ll2.sort()
    #print(li,":",ll1,ll2)
    for i in ll1:
        if i>w:
            continue
        ind = bisect.bisect(ll2,w-i)
        #print(ind,ll2[ind-1])
        if ll2[ind-1]==w-i:
            cnt+=1
            break
print(cnt)