Submission #931914

#	Time	Username	Problem	Language	Result	Execution time	Memory
931914		Younis_Dwai	Art Collections (BOI22_art)	C++17	20 / 100	83 ms	964 KiB

art

#include "art.h"
#include <bits/stdc++.h>
using namespace std ;
#define pb push_back
//
// --- 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) {
    if(N<3){
        vector<int> vv;
        for(int i=1;i<=N;i++) vv.pb(i);
        do{
            int res=publish(vv);
            if(res==0){
                    answer(vv);
                    break;
            }
        }while(next_permutation(vv.begin(),vv.end()));
        return ;
    }
    else  {
    vector<int> v;
    for(int i=1;i<=N;i++) v.pb(i);
    random_shuffle(v.begin(),v.end());
    vector<int> done;
    done.pb(v[0]);
    for(int i=1;i<N;i++){
        vector<int> guess;
        guess.pb(done[0]);
        guess.pb(v[i]);
        for(int j=1;j<=N;j++){
            if(j!=done[0] && j!=v[i]) guess.pb(j);
        }
        int res1=publish(guess);
        swap(guess[0],guess[1]);
        int res2=publish(guess);
        if(res2<=res1){
            vector<int> cur=done;
            done.clear();
            done.pb(v[i]);
            for(auto u : cur) done.pb(u);
        }
        else{
            guess.clear();
            guess.pb(v[i]);
            guess.pb(done[done.size()-1]);
            for(int j=1;j<=N;j++){
                if(j==done[done.size()-1] || j==v[i]) continue ;
                guess.pb(j);
            }
            res1=publish(guess);
            swap(guess[0],guess[1]);
            res2=publish(guess);
            if(res2<res1){
               done.pb(v[i]);
            }
            else{
                int l=0,r=i-1,mid=(l+r)/2;
                while(l<r){
                    guess.clear();
                    guess.pb(v[i]);
                    guess.pb(done[mid]);
                    for(int j=1;j<=N;j++){
                        if(j==done[mid] || j==v[i]) continue ;
                        guess.pb(j);
                    }
                    res1=publish(guess);
                    swap(guess[0],guess[1]);
                    res2=publish(guess);
                    if(res2>res1) r=mid;
                    else l=mid+1;
                    mid=(l+r)/2;
                }
                vector<int> cur;
                cur.clear();
                for(int j=0;j<done.size();j++){
                     if(j==mid){
                        cur.pb(v[i]);
                     }
                     cur.pb(done[j]);
                }
                done=cur;
            }
        }
    }
    answer(done);
    }
    return ;
}

Compilation message (stderr)

art.cpp: In function 'void solve(int)':
art.cpp:85:30: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   85 |                 for(int j=0;j<done.size();j++){
      |                             ~^~~~~~~~~~~~
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: 0 / 15
• Subtask 4: 0 / 15
• Subtask 5: 0 / 20
• Subtask 6: 0 / 30