Submission #1208519

#	Time	Username	Problem	Language	Result	Execution time	Memory
1208519		omsincoconut	Detecting Molecules (IOI16_molecules)	C++17	100 / 100	34 ms	6728 KiB

molecules

#include "molecules.h"
#include <bits/stdc++.h>

using namespace std;
typedef long long ll;

vector<int> find_subset(int l, int u, vector<int> w) {
    int n = w.size();
    vector<pair<ll, int>> wi(n);

    ll sum_all = 0;
    for (int i = 0; i < n; i++) {
        wi[i] = make_pair((ll)w[i], i);
        sum_all += w[i];
    }

    sort(wi.begin(), wi.end());
    if (u < wi[0].first || l > sum_all) return vector<int>();

    ll qc[n+1];
    qc[0] = 0;
    for (int i = 1; i <= n; i++) qc[i] = qc[i-1] + wi[i-1].first;

    int take = 0;
    while (take <= n && qc[take] <= u) take++;
    take--;

    for (int left = 0; left <= take; left++) {
        ll val = qc[left] + qc[n] - qc[n-take+left];
        if (l <= val && val <= u) {
            vector<int> ret;
            for (int i = 0; i < left; i++) ret.push_back(wi[i].second);
            for (int i = n-take+left; i < n; i++) ret.push_back(wi[i].second);
            return ret;
        }
    }

    return {};
}

Compilation message (stderr)

molecules.h:1:9: warning: #pragma once in main file
    1 | #pragma once
      |         ^~~~
molecules_c.h:1:9: warning: #pragma once in main file
    1 | #pragma once
      |         ^~~~

• Subtask 1: 9 / 9
• Subtask 2: 10 / 10
• Subtask 3: 12 / 12
• Subtask 4: 15 / 15
• Subtask 5: 23 / 23
• Subtask 6: 31 / 31