#include <bits/stdc++.h>
//#include "molecules.h"
using namespace std;
struct dou{
int w, i;
};
bool how_sort(dou x, dou y){
return x.w < y.w;
};
vector <int> find_subset(int l, int u, vector <int> w){
int n = w.size();
vector <dou> v(n);
for (int i = 0; i < n; ++ i) v[i] = {w[i], i};
vector <int> ans;
deque <int> q;
sort(v.begin(), v.end(), how_sort);
int sum; sum = 0;
for (int i = 0; i < n; ++ i){
sum += v[i].w;
if (sum > u){
sum -= v[i].w;
break;
}
q.push_back(i);
}
int rt = n - 1;
while (sum < l && q.size() && rt > 0){
sum -= v[q.front()].w;
q.pop_front();
sum += v[rt].w;
q.push_back(rt);
rt -= 1;
}
if (sum > u || sum < l) return {};
while (q.size()){
ans.push_back(v[q.back()].i);
q.pop_back();
}
return ans;
}
/*main(){
ios_base::sync_with_stdio(false); cin.tie(0); cout.tie(0);
int n, l, u; cin >> n >> l >> u;
vector <int> w(n);
for (int i = 1; i <= n; ++ i) cin >> w[i - 1];
auto v = find_subset(l, u, w);
for (int i : v) cout << i << endl;
}*/
