#include <bits/stdc++.h>
using namespace std ;
typedef long long ll ;
#define rep(i,n) for(int i = 0 ; i < n ; i++)
#define rrep(i,a,b) for(int i = a ; i < b ; i++)

ll w ;
int n ;

ll A[20] ;

int main(){
    cin >> n >> w ;
    rep(i,n) cin >> A[i] ;
    int res = 0 ;
    rep(S,1<<n){
        vector<ll> vec ;
        rep(i,n) if(S >> i & 1) vec.push_back(A[i]) ;
        rep(i,vec.size()+1){
            ll sum = 0 ;
            rep(j,vec.size()){
                if(i == j) sum += vec[j] / 2 ;
                else sum += vec[j] ;
            }
            if(sum == w) res++ ;
        }
    }
    cout << res << endl ;
}