Submission #734443

#	Time	Username	Problem	Language	Result	Execution time	Memory
734443		rnl42	Detecting Molecules (IOI16_molecules)	C++14	100 / 100	45 ms	5580 KiB

molecules

#include "molecules.h"
#include <algorithm>
#include <iostream>
#include <numeric>
using namespace std;

vector<int> find_subset(int l, int u, vector<int> _w) {
    const int N = _w.size();

    vector<int> ids(N), w(N);
    iota(ids.begin(), ids.end(), 0);
    sort(ids.begin(), ids.end(), [&_w](const int a, const int b) {
        return _w[a] < _w[b];
    });
    for (int i = 0; i < N; i++) {
        w[i] = _w[ids[i]];
    }

    vector<int> ans;
    long long sum = 0;
    for (int i = 0; i < N && sum + w[i] <= u; i++) {
        sum += w[i];
        ans.push_back(ids[i]);
    }
    for (int i = 0; sum < l && i < (N - (int)ans.size()) && i < (int)ans.size(); i++) {
        sum -= w[i];
        sum += w[N-1-i];
        ans[i] = ids[N-1-i];
    }
    if (sum < l) {
        ans.clear();
    }
    return ans;
}

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