Submission #1323443

#	Time	Username	Problem	Language	Result	Execution time	Memory
1323443		rafsanamin2020	Detecting Molecules (IOI16_molecules)	C++20	100 / 100	33 ms	6164 KiB

molecules

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

/// @brief [purai wrong approach 🔥]
typedef long long int ll;

std::vector<int> find_subset(int l, int u, std::vector<int> w)
{
    vector<int> ret;
    ll psum = 0;

    int n = w.size();

    vector<pair<ll, ll>> ww(n, pair<ll, ll>({0, 0}));

    for (int i = 0; i < n; i++)
    {
        ww[i].first = w[i];
        ww[i].second = i;
    }

    sort(ww.begin(), ww.end());

    // for (int i = 0; i < n; i++)
    // {
    //     cout << ww[i].first << " " << ww[i].second << ">\n";
    // }

    bool possible = false;

    for (int i = 0; i < n; i++)
    {
        int wgt = ww[i].first;
        int idx = ww[i].second;

        psum += wgt;
        ret.push_back(idx);

        if (psum > u)
        {
            psum -= wgt;
            ret.pop_back();
            break;
        }
        else if (psum >= l)
        {
            possible = true;
            break;
        }
    }

    if (!possible)
    {
        for (int i = 0, j = n - 1; i < ret.size() && ret.size() - 1 < j; i++, j--)
        {
            psum -= w[ret[i]];
            ret[i] = ww[j].second;
            psum += ww[j].first;

            if (psum >= l)
            {
                possible = true;
                break;
            }
        }
    }

    return possible ? ret : vector<int>(0);
}

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