Submission #1098363

#	Time	Username	Problem	Language	Result	Execution time	Memory
1098363		dzhoz0	Detecting Molecules (IOI16_molecules)	C++17	69 / 100	2 ms	856 KiB

molecules

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

vector<int> find_subset(int l, int u, vector<int> w) {
    int n = w.size();
    vector<pair<int, int>> a(n);
    for(int i = 0; i < n; i++) {
        a[i].first = w[i];
        a[i].second = i;
    }

    sort(a.begin(), a.end());
    vector<int> ps(n);
    for(int i = 0; i < n; i++) {
        if(i == 0) ps[i] = a[i].first;
        else ps[i] = ps[i - 1] + a[i].first;
    }
    // for(int i = 0; i < n; i++) cout << a[i].first << ' '; cout << '\n';
    // for(int i = 0; i < n; i++) cout << ps[i] << ' '; cout << '\n';
    if(lower_bound(ps.begin(), ps.end(), l) != ps.end() && *lower_bound(ps.begin(), ps.end(), l) <= u) {
        vector<int> res;
        for(int i = 0; i < n; i++) {
            res.push_back(a[i].second);
            if(ps[i] >= l) return res;
        }
    }

    for(int i = 0; i < n - 1; i++) {
        auto it = lower_bound(ps.begin(), ps.end(), ps[i] + l);
        // cout << i << ' ' << *it - ps[i] << ' ' << u << '\n';
        if(it != ps.end() && *it - ps[i] <= u) {
            vector<int> res;
            // cout << i << ' ' << it - ps.begin() << '\n';
            for(int j = i + 1; j <= it - ps.begin(); j++) res.push_back(a[j].second);
            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: 0 / 31