Submission #543055

#	Time	Username	Problem	Language	Result	Execution time	Memory
543055		Olympia	Detecting Molecules (IOI16_molecules)	C++17	9 / 100	95 ms	296 KiB

molecules

#include <vector>
#include <algorithm>
#include <iostream>
#include <set>
#include <cmath>
#include <map>
#include <random>
#include <cassert>
#include <ctime>
#include <cstdlib>
#include <limits.h>
#include "molecules.h"
 
using namespace std;
 
vector<int> find_subset (int l, int r, vector<int> w) {
    for (int i = 0; i < w.size(); i++) {
        if (w[i] >= l && w[i] <= r) {
            return {i};
        }
    }
    vector<pair<int64_t,int>> vec;
    for (int i = 0; i < w.size(); i++) {
        vec.push_back({w[i], i});
    }
    int t = 50000;
    while (t--) {
        random_shuffle(vec.begin(), vec.end());
        int64_t pref = 0;
        for (int i = 0; i < w.size(); i++) {
            pref += vec[i].first;
            if (pref >= l && pref <= r) {
                vector<int> indices;
                for (int j = 0; j <= i; j++) {
                    indices.push_back(vec[j].second );
                }
                return indices;
            }
            if (pref > r) {
                break;
            }
        }
    }
    return {};
}
 
void print (vector<int> v) {
    for (int i: v) {
        cout << i << ' ';
    }
    cout << '\n';
}
 
/*
 
int main() {
    ios_base::sync_with_stdio(false);
    cin.tie(NULL);
    print(find_subset(14, 15, {5, 5, 6, 6}));
}
 
 */

Compilation message (stderr)

molecules.cpp: In function 'std::vector<int> find_subset(int, int, std::vector<int>)':
molecules.cpp:17:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   17 |     for (int i = 0; i < w.size(); i++) {
      |                     ~~^~~~~~~~~~
molecules.cpp:23:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   23 |     for (int i = 0; i < w.size(); i++) {
      |                     ~~^~~~~~~~~~
molecules.cpp:30:27: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   30 |         for (int i = 0; i < w.size(); i++) {
      |                         ~~^~~~~~~~~~

• Subtask 1: 9 / 9
• Subtask 2: 0 / 10
• Subtask 3: 0 / 12
• Subtask 4: 0 / 15
• Subtask 5: 0 / 23
• Subtask 6: 0 / 31