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>
#define endl '\n'
#define pii pair<int,int>
#define fi first
#define se second
#define ll long long
#define pb push_back
#define all(x) x.begin(),x.end()
#pragma GCC optimize ("Ofast","unroll-loops")
using namespace std;
const int MOD = 1e9+7;
const int MAXN = 50;
ll arr[MAXN];
ll ans = 1 ;
ll n, m ;
void solve(ll idx , ll sum)
{
if(sum>m || idx>n)return ;
else if(idx<=n && sum<=m)ans++;
solve(idx+1,sum+arr[idx]);
solve(idx+1,sum);
}
int main() {
ios::sync_with_stdio(0);
cin.tie(0);
cout.tie(0);
cin >> n >> m ;
for(int i = 1 ;i <= n ;i++)cin >> arr[i];
solve(1,0);
cout<<ans/2;
return 0 ;
}
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