Submission #597776

#	Time	Username	Problem	Language	Result	Execution time	Memory
597776		yanndev	Art Collections (BOI22_art)	C++17	70 / 100	1710 ms	680 KiB

art

#include <art.h>
#include <bits/stdc++.h>
using namespace std;

void solve(int n) {
    vector<int> posOfVal(n, -1);

    // newInv = oldInv - (rank - 1) + (n - rank)
    // (newInv - oldInv - ()

    for (int i = 1; i <= n; i++) {
        vector<int> ls {};
        ls.push_back(i);
        for (int j = 1; j <= n; j++)
            if (j != i)
                ls.push_back(j);

        int oldInv = publish(ls);
        
        ls.clear();
        for (int j = 1; j <= n; j++)
            if (j != i)
                ls.push_back(j);
        ls.push_back(i);

        // curInv = oldInv 

        int curInv = publish(ls);
        // curInv = oldInv - (rank - 1) + (n - rank)
        // curInv = oldInv - (2 * rank) + (n + 1)
        // -(curInv - oldInv - (n + 1))/2 = rank
        posOfVal[i] = -(curInv - oldInv - (n + 1)) / 2 - 1;
    }

    vector<int> ls (n, -1);
    for (int i = 1; i <= n; i++)
        ls[posOfVal[i]] = i;
    answer(ls);
}

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: 0 / 30