Submission #754048

#	Time	Username	Problem	Language	Result	Execution time	Memory
754048		jakobrs	Art Collections (BOI22_art)	C++17	100 / 100	1568 ms	680 KiB

art

#include <iostream>
#include <vector>
#include <algorithm>

int publish(std::vector<int> R);
void answer(std::vector<int> R);

void solve(int N) {
    // Used for comparisons
    std::vector<int> R;
    std::vector<int> ans(N, -1);

    for (int i = 1; i <= N; i++) {
        R.push_back(i);
    }

    int prev = publish(R);

    for (int i = N; i >= 2; i--) {
        R.pop_back();
        R.insert(R.begin(), i);

        int measured = publish(R);

        // measured = prev - ob + nb
        // ob = N - nb - 1
        // nb = intended position i think ???
        // measured - prev = nb - ob = nb - N + nb + 1
        // measured - prev + N - 1 = 2 nb

        int pos = ((measured - prev) + N - 1)/2;
        ans[pos] = i;

        prev = measured;
    }

    for (int i = 0; i < N; i++) {
        if (ans[i] == -1) {
            ans[i] = 1;
        }
    }

    answer(ans);
}

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: 20 / 20
• Subtask 6: 30 / 30