Submission #1104532

#	Time	Username	Problem	Language	Result	Execution time	Memory
1104532		ngano_upat_na	Detecting Molecules (IOI16_molecules)	C++17	9 / 100	207 ms	432 KiB

molecules

#pragma GCC optimize("O1,O2,O3,Ofast,unroll-loops")
#include "bits/stdc++.h"
#include "molecules.h"
using namespace std;
using ll = long long;

vector<int> find_subset(int l, int u, vector<int> w) {
    srand(time(0));

    int n = (int)w.size();
    ll sum = 0;
    for (int i=0; i<n; i++) {
        sum += (ll)w[i];
    }
    if (sum == u) {
        vector<int> res;
        for (int i=0; i<n; i++) {
            res.push_back(i);
        }
        return res;
    }
    if (sum < l) {
        vector<int> ans;
        return ans;
    }

    for (int i=0; i<30000; i++) {
        set<int> s;
        for (int j=0; j<n; j++) {
            int r = rand()%n;
            s.insert(r);
        }
        sum = 0;
        for (auto &e:s) {
            sum += (ll)w[e];
        }
        if (l <= sum && sum <= u) {
            vector<int> res;
            for (auto &e:s) {
                res.push_back(e);
            }
            return res;
        }
    }
    vector<int> emp;
    return emp;
}

• Subtask 1: 9 / 9
• Subtask 2: 0 / 10
• Subtask 3: 0 / 12
• Subtask 4: 0 / 15
• Subtask 5: 0 / 23
• Subtask 6: 0 / 31