Submission #714269

#	Time	Username	Problem	Language	Result	Execution time	Memory
714269		vjudge1	Art Collections (BOI22_art)	C++17	20 / 100	104 ms	264 KiB

art

#include "art.h"
#include <bits/stdc++.h>
using namespace std;
#define ll long long
#define pb push_back
#define F first
#define S second
#define INF 1e18
#define all(v) (v).begin(),(v).end()
#define rall(v) (v).rbegin(),(v).rend()
#define pii pair<int,int>
#define pll pair<ll,ll>
#define OK cout<<"Ok"<<endl;
#define MOD (ll)(1e9+7)
//
// --- 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 ask(vector<int>&vt,int ind,int pl){
    vector<int>v;
    for(int i=0;i<pl;i++){
        v.pb(vt[i]);
    }
    v.pb(vt[ind]);
    for(int i=pl;i<vt.size();i++){
        if(i!=ind){
            v.pb(vt[i]);
        }
    }
    return publish(v);
}
void change(vector<int>&vt,int ind,int pl){
    vector<int>v;
    for(int i=0;i<pl;i++){
        v.pb(vt[i]);
    }
    v.pb(vt[ind]);
    for(int i=pl;i<vt.size();i++){
        if(i!=ind){
            v.pb(vt[i]);
        }
    }
    vt=v;
}
void solve(int n) {
    vector<int>vt;
    for(int i=1;i<=n;i++){
        vt.pb(i);
    }
    int k=publish(vt);
    while(k>0){
        for(int i=2;i<=n;i++){
            swap(vt[i-1],vt[i-2]);
            int x=publish(vt);
            swap(vt[i-1],vt[i-2]);
            if(x<k){
                int l=1,r=i;
                while(l<=r){
                    int m=(l+r)/2;
                    int x=ask(vt,i-1,m-1);
                    if(x<k){
                        k=x;
                        r=m-1;
                    }
                    else{
                        l=m+1;
                    }
                }
                change(vt,i-1,r);
                if(k==0){
                    answer(vt);
                }
            }
        }
    }
    answer(vt);
}

Compilation message (stderr)

art.cpp: In function 'int ask(std::vector<int>&, int, int)':
art.cpp:33:19: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   33 |     for(int i=pl;i<vt.size();i++){
      |                  ~^~~~~~~~~~
art.cpp: In function 'void change(std::vector<int>&, int, int)':
art.cpp:46:19: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   46 |     for(int i=pl;i<vt.size();i++){
      |                  ~^~~~~~~~~~
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