Submission #1118938

#	Time	Username	Problem	Language	Result	Execution time	Memory
1118938		adaawf	Detecting Molecules (IOI16_molecules)	C++17	100 / 100	47 ms	7868 KiB

molecules

#include <iostream>
#include <vector>
#include <algorithm>
using namespace std;
long long int c[200005];
vector<int> find_subset(int l, int u, vector<int> a) {
    vector<pair<int, int>> v;
    v.push_back({0, 0});
    for (int i = 0; i < a.size(); i++) {
        v.push_back({a[i], i});
    }
    sort(v.begin(), v.end());
    int n = v.size() - 1;
    for (int i = 1; i <= n; i++) c[i] = c[i - 1] + v[i].first;
    for (int i = 1; i <= n; i++) {
        if (c[i] > u) continue;
        if (c[n] - c[n - i] < l) continue;
        long long int h = c[i];
        vector<int> vv;
        for (int j = 1; j <= i; j++) vv.push_back(v[j].second);
        if (h >= l && h <= u) return vv;
        for (int j = i - 1; j >= 0; j--) {
            h -= a[vv[j]];
            h += v[n - i + j + 1].first;
            vv[j] = v[n - i + j + 1].second;
            if (h >= l && h <= u) return vv;
        }
    }
    vector<int> vv;
    return vv;
}

Compilation message (stderr)

molecules.cpp: In function 'std::vector<int> find_subset(int, int, std::vector<int>)':
molecules.cpp:9:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
    9 |     for (int i = 0; i < a.size(); i++) {
      |                     ~~^~~~~~~~~~

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