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>
#include "molecules.h"
using namespace std;
#define ll long long
std::vector<int> find_subset(int l, int u, std::vector<int> w)
{
ll n = w.size();
vector<pair<ll,ll>> a(n);
for(ll i = 0;i < n;i++)a[i] = {w[i],i};
sort(a.begin(),a.end());
ll N = n,s = 0;
while(N != 0 && s + w[N-1] < l){s += a[N-1].first;N--;}
if(N == n)
{
for(int i = 0;i < n;i++)if(w[i] >= l && w[i] <= u)return {i};
return {};
}
if(N == 0)return {};
N = n - N;s = 0;
vector<pair<ll,ll>> p(n-N);
for(ll i = N;i < n;i++)p[i-N] = a[i];
for(ll i = 0;i < N-1;i++)s += a[i].first;
ll k = 0;
for(ll i = N-1;i < n;i++)
{
s += a[i].first;
ll left = 0,right = n-N-1;
while(left != right)
{
ll mid = (left + right) / 2;
if(p[mid].first + s < l)left++;
else if(p[mid].first + s > u)right--;
else left = right = mid;
}
if(p[left].first + s >= l && p[left].first + s <= u)
{
vector<int> ans;
for(ll j = i;j >= k;j--)ans.push_back(a[j].second);
ans.push_back(p[left].second);
return ans;
}
s -= a[k].first;
if(k < n-N)p[k] = a[k];
k++;
}
return {};
}
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