Submission #902590

#	Time	Username	Problem	Language	Result	Execution time	Memory
902590		gogopro	Art Collections (BOI22_art)	C++17	0 / 100	0 ms	344 KiB

art

#include <algorithm>
#include <iostream>
#include <random>
#include "art.h"
using namespace std;
//
// --- Sample implementation for the task art ---
//
// To compile this program with the sample grader, place:
//     art.h art_sample.cpp sample_grader.cpp
// in a single folder, then open the terminal in this directory (right-click onto an empty spot in the directory,
// left click on "Open in terminal") and enter e.g.:
//     g++ -std=c++17 art_sample.cpp sample_grader.cpp
// in this folder. This will create a file a.out in the current directory which you can execute from the terminal
// as ./a.out
// See task statement or sample_grader.cpp for the input specification
//
int complaints;
vector<int> order;

void solve(int N) {

    order.reserve(N);
    for (int i = 0; i < N; ++i) {
        order.push_back(i + 1);
    }
    int current_idx = 0;
    complaints = publish(order);
    stable_sort(order.begin(), order.end());
    std::random_device rd;
    std::mt19937 g(rd());
    vector<int> indexes;
    indexes.reserve(N);
    for (int i = 0; i < N; ++i) {
        indexes.push_back(i);

    }
    shuffle(indexes.begin(), indexes.end(), g);
    while (complaints != 0) {
        swap(order[indexes[current_idx]], order[indexes[current_idx + 1]]);
        int new_complaints = publish(order);
        if (new_complaints > complaints) swap(order[indexes[current_idx]], order[indexes[current_idx + 1]]); // return to back
        ++current_idx;
        complaints = min(complaints, new_complaints);
        if (current_idx == order.size() - 1) {
            current_idx = 0;
            shuffle(indexes.begin(), indexes.end(), g);
        }
        cout << complaints << endl;
    }
    answer(order);
}

Compilation message (stderr)

art.cpp: In function 'void solve(int)':
art.cpp:45:25: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   45 |         if (current_idx == order.size() - 1) {
      |             ~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~
interface.cpp: In function 'int publish(std::vector<int>)':
interface.cpp:20:17: warning: comparison of integer expressions of different signedness: 'std::vector<int>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare]
   20 |     if(v.size() != N) {
      |        ~~~~~~~~~^~~~
interface.cpp: In function 'void answer(std::vector<int>)':
interface.cpp:36:17: warning: comparison of integer expressions of different signedness: 'std::vector<int>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare]
   36 |     if(v.size() != N) {
      |        ~~~~~~~~~^~~~

• Subtask 1: 0 / 5
• Subtask 2: 0 / 15
• Subtask 3: 0 / 15
• Subtask 4: 0 / 15
• Subtask 5: 0 / 20
• Subtask 6: 0 / 30