This submission is migrated from previous version of oj.uz, which used different machine for grading. This submission may have different result if resubmitted.
#include <bits/stdc++.h>
using namespace std;
#define endl '\n'
#define pb push_back
#define ll long long
#define int long long
const long long inf=1e18;
const int MOD=1e9+7;
const int N=41;
int a[N],n,m,ans=0,dp[40][1000001];
bool flag=0;
vector<int> v;
void func(int i,int score){
if(flag && i==n/2){
auto it=upper_bound(v.begin(),v.end(),m-score)-v.begin();
ans+=it;
return;
}
if(i==n){
v.pb(score);
return;
}
func(i+1,score);
if(score+a[i]<=m)func(i+1,score+a[i]);
}
signed main()
{
ios_base::sync_with_stdio(0);cin.tie(0);cout.tie(0);
cin>>n>>m;
for(int i=0;i<n;i++)cin>>a[i];
dp[0][0]=1; dp[0][a[0]]=1;
func(n/2,0);
flag=1;
sort(v.begin(),v.end());
func(0,0);
cout<<ans;
}
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