Submission #603298

#	Time	Username	Problem	Language	Result	Execution time	Memory
603298		l_reho	Art Collections (BOI22_art)	C++17	35 / 100	194 ms	208 KiB

art

#include "art.h"
//
// --- 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
//

#include <bits/stdc++.h>
using namespace std;
void solve(int N) {
	// facciamo 20 punti
	
	vector<int> V;
	vector<int> pos(N+1, -1);
	
	
	for(int i = 0; i < N; i++) V.push_back(i+1);
	
	vector<int> init = V;
	int cnt = 0;
	// facciamo 35 punti
	stable_sort(V.begin(), V.end(), [&](int v1, int v2){
		// adesso metto affianco v1 e v2
		// mi serve la posizione di v1 e v2 nel coso iniziale, faccio due swap
		// creo ref e poi faccio lo swap e calcolo il nuovo reef
		
		// vector<int> init = init_;
		
		int posV1 = v1-1;
		int posV2 = v2-1;
		if(posV1 > posV2) swap(posV1, posV2);
		
		swap(init[posV1+1], init[posV2]);
			
		int ref = publish(init);
		
	    swap(init[posV1+1], init[posV1]);
		
		int nref = publish(init);
		
		// reversiamo gli swap
		swap(init[posV1+1], init[posV1]);	
		swap(init[posV1+1], init[posV2]);
		
		if(v1 > v2)
			return nref == ref-1;
		else return nref == ref+1;
		
	});
	
	answer(V);
}

Compilation message (stderr)

art.cpp: In function 'void solve(int)':
art.cpp:27:6: warning: unused variable 'cnt' [-Wunused-variable]
   27 |  int cnt = 0;
      |      ^~~
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