Submission #431757

#	Time	Username	Problem	Language	Result	Execution time	Memory
431757		phathnv	Detecting Molecules (IOI16_molecules)	C++11	100 / 100	53 ms	4776 KiB

molecules

#include "molecules.h"
#include <bits/stdc++.h>
using namespace std;

vector<int> find_subset(int u, int v, vector<int> w) {
    int n = w.size();
    vector<int> ord(n);
    iota(ord.begin(), ord.end(), 0);
    sort(ord.begin(), ord.end(), [&](const int &a, const int &b) {
        return w[a] < w[b];
    });
    long long sumL = 0, sumR = 0;
    for (int i = 1; i <= n; i++) {
        sumL += w[ord[i - 1]];
        sumR += w[ord[n - i]];
        if (max(1ll * u, sumL) <= min(1ll * v, sumR)) {
            vector<int> res;
            for (int j = 0; j < i; j++) {
                if (sumL < u) {
                    sumL -= w[ord[j]];
                    sumL += w[ord[n - 1 - j]];
                    res.push_back(ord[n - 1 - j]);
                } else {
                    res.push_back(ord[j]);
                }
            }
            return res;
        }
    }
    return vector<int>(0);
}

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