Submission #1221051

#	Time	Username	Problem	Language	Result	Execution time	Memory
1221051		madamadam3	Detecting Molecules (IOI16_molecules)	C++20	100 / 100	38 ms	4524 KiB

molecules

#include "molecules.h"
#include <bits/stdc++.h>

using namespace std;

typedef long long ll;

vector<int> find_subset(int l, int u, vector<int> w) {
    int n = w.size();
    vector<int> wsort(n); iota(wsort.begin(), wsort.end(), 0);
    sort(wsort.begin(), wsort.end(), [&](int a, int b) {return w[a] < w[b];});

    vector<int> ans;
    vector<ll> prefix(n+1, 0); for (int i = 1; i <= n; i++) prefix[i] = prefix[i-1] + w[wsort[i-1]];
    for (int i = 1; i <= n; i++) {
        int lo = i-1, hi = n;

        while (lo < hi) {
            int mid = lo + (hi - lo + 1) / 2;
            
            if (prefix[mid] - prefix[i - 1] <= u) {
                lo = mid;
            } else {
                hi = mid - 1;
            }
        }

        ll pv = prefix[lo] - prefix[i-1];
        if (l <= pv && pv <= u) {
            for (int k = i-1; k < lo; k++) ans.push_back(wsort[k]);
            break;
        }
    }

    return ans;
}

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