#include<bits/stdc++.h>
//#include "molecules.h"
#define mp make_pair
#define fi first
#define se second
using namespace std;
typedef pair<int, int> pii;
vector<int> find_subset(int l, int u, vector<int> w)
{
vector<pii> _w;
vector<int> ans; ans.clear();
int n, pivot = -1;
long long s = 0;
n = w.size(); _w.resize(n);
for(int i = 0; i < n; ++i) _w[i] = mp(w[i], i);
sort(_w.begin(), _w.end());
for(int i = 0; i < n; ++i)
if(s + _w[i].fi <= u) s += _w[i].fi, pivot = i;
else break;
if(pivot == -1) return ans;
for(int i = pivot; i < n; ++i) {
if(s >= l && s <= u) {
for(int j = i - pivot; j <= i; ++j) ans.push_back(_w[j].se);
return ans;
}
if(i < n - 1) s += (_w[i + 1].fi - _w[i - pivot].fi);
}
return ans;
}
