Submission #1175192

#	Time	Username	Problem	Language	Result	Execution time	Memory
1175192		bangan	Detecting Molecules (IOI16_molecules)	C++20	100 / 100	34 ms	3656 KiB

molecules

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

using i64 = long long;
using i2 = std::array<int, 2>;

std::vector<int> find_subset(int l, int u, std::vector<int> w) {
    int n = w.size();
    std::vector<i2> a(n);
    for (int i = 0; i < n; i++) {
        a[i] = {w[i], i};
    }
    std::sort(a.begin(), a.end());

    i64 sum = 0;
    int r = n - 1;
    for (int i = 0; i < n; i++) {
        while (r + 1 < n && sum > u) {
            sum -= a[++r][0];
        }
        while (r >= i && sum + a[r][0] <= u) {
            sum += a[r--][0];
        }

        if (l <= sum && sum <= u) {
            std::vector<int> ans;
            for (int j = 0; j < i; j++) {
                ans.push_back(a[j][1]);
            }
            for (int j = n - 1; j > r; j--) {
                ans.push_back(a[j][1]);
            }
            return ans;
        }

        sum += a[i][0];
        if (r == i - 1) {
            sum -= a[++r][0];
        }
        // if (r == i) {
        //     a[++r][0];
        // }
    }

    return {};
}

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