Submission #862366

#	Time	Username	Problem	Language	Result	Execution time	Memory
862366		The_Samurai	Art Collections (BOI22_art)	C++17	100 / 100	1220 ms	1772 KiB

art

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

/*
 A = publish({x+1, x+2, ..., n, 1, 2, ..., x})
 B = publish({x, x+1, x+2, ..., n, 1, 2, ..., x-1})
 sol[x] = uni asl orderi
 B = A + (sol[x] - 1) - (n - sol[x])
 B = A - 1 - n + 2*sol[x]
 sol[x] = (B-A+1+n)/2
*/

void solve(int n) {
    vector<int> sol(n + 1), p(n);
    iota(p.begin(), p.end(), 1);
    int A = publish(p);
    for (int i = n; i > 1; i--) {
        p.insert(p.begin(), i); p.pop_back();
        int B = publish(p);
        assert((B - A + 1 + n) % 2 == 0);
        sol[i] = (B - A + 1 + n) / 2;
        A = B;
    }
    for (int i = 1; i <= n; i++) {
        if (!count(sol.begin(), sol.end(), i)) {
            sol[1] = i;
            break;
        }
    }
    vector<int> ans(n);
    for (int i = 1; i <= n; i++) ans[sol[i] - 1] = i;
    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