Submission #721782

#	Time	Username	Problem	Language	Result	Execution time	Memory
721782		rshohruh	Art Collections (BOI22_art)	C++17	50 / 100	840 ms	496 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
//
vector<int> order, b;

void merge_sort(int l, int r){
    if(r - l <= 1) return;
    int m = (l + r) / 2;
    merge_sort(l, m);
    merge_sort(m, r);

    int n = r - l;

    b.assign(n, 0);
    int st = publish(order), end;

    for(int i = 0, L = l, R = m; i < n; ++i){
        if(L == m) b[i] = order[R++];
        else if(R == r) b[i] = order[L ++];
        else{
            swap(order[L], order[R]);
            end = publish(order);
            swap(order[L], order[R]);
            if(end < st) b[i] = order[R ++];
            else b[i] = order[L ++];
        }
    }
    for(int i = 0; i < n; i ++) order[i+l] = b[i];
}

void solve(int N) {
    order.resize(N);
    for(int i = 0; i < N; ++i) order[i] = i+1;
    merge_sort(0, N);
    answer(order);
}

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