Submission #602481

#	Time	Username	Problem	Language	Result	Execution time	Memory
602481		shrimb	Art Collections (BOI22_art)	C++17	35 / 100	203 ms	2768 KiB

art

#include "art.h"
#include"bits/stdc++.h"
// #include "ranges"
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 n;
int asked[4001][4001];

bool cmp (  int a, int b) {
    if (asked[a][b]) return asked[a][b] == 1;
    vector<int> x;
    for (int i = 1 ; i <= n ; i++) {
        if (i != a and i != b) x.push_back(i);
    }
    auto y = x;
    x.push_back(a);
    x.push_back(b);
    y.push_back(b);
    y.push_back(a);
    asked[a][b] = publish(x) < publish(y) ? 1 : -1;
    asked[b][a] = - asked[a][b];
    return asked[a][b] == 1;
}

void solve(int N) {
    for (int i = 1 ; i <= N ; i++) {
        for (int j = 1 ; j <= N ; j++) {
            asked[i][j] = 0;
        }
    }
    vector<int> order(N);
    n = N;
    for (int i = 0 ; i < N ; i++) order[i] = i + 1;
    if (N < 445) {
        stable_sort(order.begin(), order.end(), cmp);
        answer(order);
        return;
    }
    assert(0);
    random_shuffle(order.begin(), order.end());
    vector<pair<int,int>> v;
    for (int i = 1 ; i <= N ; i++) {
        auto tmp = order;
        tmp.erase(find(tmp.begin(), tmp.end(), i));
        tmp.push_back(i);
        v.emplace_back(publish(tmp), i);
    }
    sort(v.begin(), v.end());
    reverse(v.begin(), v.end());
    vector<int> ans;
    for (auto [i, j] : v) ans.push_back(j);
    answer(ans);
}

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: 0 / 15
• Subtask 5: 0 / 20
• Subtask 6: 0 / 30