Submission #643921

#	Time	Username	Problem	Language	Result	Execution time	Memory
643921		Matteo_Verz	Art Collections (BOI22_art)	C++17	100 / 100	1549 ms	532 KiB

art

#include "art.h"
#include <bits/stdc++.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
//
void solve(int n) {
    vector <int> order(n), answers(n);
    iota(order.begin(), order.end(), 1);

    for (int i = 0; i < n; i++) {
        answers[i] = publish(order);
        for (int i = 0; i < n - 1; i++)
            order[i] = order[i + 1];
        order[n - 1] = i + 1;
    }

    for (int i = 0; i < n; i++) {
        int a = answers[i];
        int b = answers[(i + 1) % n];

        // a - b = d = x - y
        // x + y = n - 1
        // => 2y + d = n - 1
        // y = (n - 1 - d) / 2
        // x = d + (n - 1 - d) / 2
        // position of value (i + 1) is x + 1
        int d = a - b;
        int y = (n - 1 - d) / 2;
        int x = d + y;

        order[x] = i + 1;
    }

    answer(order);
}

Compilation message (stderr)

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