#include<bits/stdc++.h> #include<atcoder/all> using namespace std; using namespace atcoder; #define rep(i,n)for (int i = 0; i < int(n); ++i) #define rrep(i,n)for (int i = int(n)-1; i >= 0; --i) #define all(x) (x).begin(), (x).end() #define rall(x) (x).rbegin(), (x).rend() template<class T> void chmax(T& a, const T& b) {a = max(a, b);} template<class T> void chmin(T& a, const T& b) {a = min(a, b);} using ll = long long; using P = pair<int,int>; using VI = vector<int>; using VVI = vector<VI>; using VL = vector<ll>; using VVL = vector<VL>; int main() { ios::sync_with_stdio(false); cin.tie(0); int n, w; cin >> n >> w; VI a(n); rep(i, n) cin >> a[i]; int ans = 0; rep(s, 1 << n) if (s) { VI b; rep(i, n) if (s >> i & 1) b.push_back(a[i]); int sz = b.size(); rep(t, 1 << sz) { ll x = 0; rep(i, sz) x += t >> i & 1 ? b[i] : b[i] / 2; if (x == w) { ans++; break; } } } cout << ans << endl; }