Submission #579675

#	Time	Username	Problem	Language	Result	Execution time	Memory
579675		Josia	Art Collections (BOI22_art)	C++17	50 / 100	837 ms	472 KiB

art

#include <bits/stdc++.h>
#include "art.h"

using namespace std;


int nPublic;


// map<pair<int, int>, bool> dict;


// bool compare(int a, int b) {
//     if (dict.count({a, b})) return dict[{a, b}];

//     vector<int> ask = {a};

//     for (int i = 0; i<nPublic; i++) {
//         if (i+1 == a || i+1 == b) continue;
//         ask.push_back(i+1);
//     }
//     ask.push_back(b);

    
//     int AB = publish(ask);

//     ask[0] = b;
//     ask[nPublic-1] = a;
//     int BA = publish(ask);

//     dict[{a, b}] = AB < BA;
//     dict[{b, a}] = BA < AB;

//     return AB < BA;
// }


int query(vector<int> a) {
    for (int &i: a) i++;
    return publish(a);
}


void solve(int n) {
    nPublic = n;
    
    vector<int> a;

    for (int i = 0; i<n; i++) {
        a.push_back(i);
    }

    vector<int> between0andme(n);

    for (int i = 1; i<n; i++) {
        swap(a[i], a[n-1]);
        int one = query(a);

        swap(a[n-1], a[0]);
        int two = query(a);

        swap(a[n-1], a[0]);
        swap(a[i], a[n-1]);
        
        between0andme[i] = abs(one-two);
    }

    cerr << "\n";

    int extreme = max_element(between0andme.begin(), between0andme.end())-between0andme.begin();
    cerr << extreme << "\n\n";

    vector<int> newA = {extreme};


    for (int i = 0; i<n; i++) {
        if (i == extreme) continue;
        newA.push_back(i);
    }

    vector<int> ranking(n, -1);
    ranking[0] = extreme;

    for (int i = 1; i<n; i++) {
        swap(newA[n-1], newA[i]);


        int one = query(newA);

        swap(newA[n-1], newA[0]);
        int two = query(newA);

        swap(newA[n-1], newA[0]);
        swap(newA[n-1], newA[i]);

        // cout << abs(one-two) << "\n";
        ranking[abs(one-two)/2 + 1] = newA[i];
    }


    if (query(ranking)) reverse(ranking.begin(), ranking.end());



    for (int &i: ranking) i++;
    answer(ranking);
}



// signed main() {
//     cin.tie(0);
//     ios_base::sync_with_stdio(0);

//     int n; cin >> n;

//     deque<int> a(n);

//     for (int i = 0; i<n; i++) cin >> a[i];

//     for (int i = 0; i<n; i++) {
//         int cnt = 0;
//         for (int i = 0; i<n; i++) {
//             for (int j = i+1; j<n; j++) {
//                 if (a[i]>a[j]) cnt++;
//             }
//         }
//         a.push_back(a[0]);
//         a.pop_front();
//         cout << cnt << "\n";
//     }

//     return 0;
// }

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: 0 / 20
• Subtask 6: 0 / 30