제출 #1072851

#제출 시각아이디문제언어결과실행 시간메모리
1072851thinknoexit즐거운 행로 (APIO20_fun)C++17
0 / 100
2051 ms5208 KiB
#include "fun.h" #include<bits/stdc++.h> using namespace std; using ll = long long; const int N = 100100; int n; set<pair<int, int>> s[N]; vector<int> createFunTour(int _N, int Q) { n = _N; // if (n <= 500) { // vector<bool> ch(n, false); // vector<vector<int>> dis(n, vector<int>(n, 0)); // for (int i = 0;i < n;i++) { // for (int j = i + 1;j < n;j++) { // dis[i][j] = dis[j][i] = hoursRequired(i, j); // } // } // int mx = 0, idx = 0; // for (int i = 0;i < n;i++) { // if (dis[0][i] > mx) { // mx = dis[0][i]; // idx = i; // } // } // vector<int> res; // res.push_back(idx); // ch[idx] = 1; // for (int i = 1;i < n;i++) { // int mx = 0, idx = 0; // for (int j = 0;j < n;j++) { // if (ch[j]) continue; // if (dis[res.back()][j] > mx) { // mx = dis[res.back()][j]; // idx = j; // } // } // ch[idx] = 1; // res.push_back(idx); // } // return res; // } for (int i = n - 1;i >= 0;i--) { s[i].insert({ 0, i }); if (2 * i + 1 < n) { for (auto& [d, j] : s[2 * i + 1]) s[i].insert({ d + 1, j }); } if (2 * i + 2 < n) { for (auto& [d, j] : s[2 * i + 2]) s[i].insert({ d + 1, j }); } } vector<int> res; res.push_back(n - 1); while ((int)res.size() < n) { int now = res.back(); s[now].erase({ 0, now }); int d = 0; int mx = 0, idx = -1; while (now != 0) { int p = (now - 1) / 2; s[p].erase({ ++d, res.back() }); int dis = d, id = 0; if (now == 2 * p + 1) { if (s[now + 1].empty()) id = p; else { auto x = --s[now + 1].end(); dis += x->first, id = x->second; } } else { if (s[now - 1].empty()) id = p; else { auto x = --s[now - 1].end(); dis += x->first, id = x->second; } } if (dis > mx) { mx = dis; idx = id; } } res.push_back(idx); now = idx; } return res; }
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