Submission #1121015

#	Time	Username	Problem	Language	Result	Execution time	Memory
1121015		adiyer	Art Collections (BOI22_art)	C++17	100 / 100	1360 ms	1888 KiB

art

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

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
//

void solve(int N) {
    int n = N;
    vector < int > ord, cpy;
    for(int i = 1; i <= n; i++) ord.push_back(i);
    int lst = publish(ord);
    for(int i = 1; i < n; i++){
        cpy.clear();
        cpy.push_back(ord[i]);
        for(int j = 0; j < i; j++) cpy.push_back(ord[j]);
        for(int j = i + 1; j < n; j++) cpy.push_back(ord[j]);
        int cur = publish(cpy);
        int delta = cur - lst, pos;
        for(int j = 0; j <= i; j++)
            if(delta == -i + 2 * j)
                pos = j;
        cpy.clear();
        // cout << pos << ' ' << delta << '\n';
        for(int j = 0; j < pos; j++) cpy.push_back(ord[j]);
        cpy.push_back(ord[i]);
        for(int j = pos; j < n; j++) 
            if(j != i)
                cpy.push_back(ord[j]);
        ord = cpy;
        lst -= i - pos;
        // for(auto it : ord) cout << it << ' ';
        // cout << '\n';
    }
    answer(ord);
}

Compilation message (stderr)

art.cpp: In function 'void solve(int)':
art.cpp:42:18: warning: 'pos' may be used uninitialized in this function [-Wmaybe-uninitialized]
   42 |         lst -= i - pos;
      |                ~~^~~~~
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: 20 / 20
• Subtask 6: 30 / 30