Submission #1204262

#	Time	Username	Problem	Language	Result	Execution time	Memory
1204262		notme	Detecting Molecules (IOI16_molecules)	C++20	69 / 100	34 ms	5044 KiB

molecules

#include<bits/stdc++.h>
#include "molecules.h"
#define pb push_back
using namespace std;
const int maxn = 2e6 + 10;
int n, pref[maxn], suff[maxn];
std::vector<int> find_subset(int l, int u, std::vector<int> w)
{n = w.size();
    vector < pair < int, int > > g;
    for (int i = 0; i < n; ++ i)
        g.pb(make_pair(w[i], i));

    vector < pair < int, int > > ans;
    sort(g.begin(), g.end());
    pref[0] = g[0].first;
    for (int i = 1; i < n; ++ i)
        pref[i] = pref[i-1] + g[i].first;
    suff[n] = 0;
    for (int i = n-1; i >= 0; -- i)
        suff[i] = suff[i+1] + g[i].first;
    vector < int > res;
    for (int k = 1; k <= n; ++ k)
    {
        if(pref[k-1] <= u && suff[n - 1 - k + 1] >= l)
        {
            int lt = 0, rt = k-1, sum = pref[k-1];
            while(sum < l)
            {
                sum -= g[lt].first;
                sum += g[rt+1].first;

                lt ++;
                rt ++;
                if(sum > u)break;

            }
            if(sum >= l && sum <= u)
            {
                long long val = 0;
                for (int i = lt; i <= rt; ++ i)
                {
                    res.push_back(g[i].second);

                }
                return res;
            }

        }
    }
    return res;
}

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: 0 / 31