This submission is migrated from previous version of oj.uz, which used different machine for grading. This submission may have different result if resubmitted.
#include <bits/stdc++.h>
#define all(x) x.begin(), x.end()
#define sz(x) (int) x.size()
#define endl '\n'
#define pb push_back
#define _ ios_base::sync_with_stdio(false);cin.tie(NULL);cout.tie(NULL);
using namespace std;
using ll = long long;
using ull = unsigned long long;
using ii = pair<int,int>;
using iii = tuple<int,int,int>;
const int mod = 1e9+7;
const int inf = 2e9+1;
const int maxn = 3e5+100;
template<typename X, typename Y> bool ckmin(X& x, const Y& y) { return (y < x) ? (x=y,1):0; }
template<typename X, typename Y> bool ckmax(X& x, const Y& y) { return (x < y) ? (x=y,1):0; }
#include "fun.h"
// static void wrongAnswer(std::string message) {
// printf("WA: %s\n", message.c_str());
// exit(0);
// }
// namespace tree_helper {
// static int N;
// static int logN;
// static std::vector<std::vector<int>> parent;
// static std::vector<int> depth;
// static std::vector<int> subtree_size;
// static void dfs(
// const std::vector<std::vector<int>>& adj_list,
// int current_node, int parent_node) {
// parent[0][current_node] = parent_node;
// subtree_size[current_node] = 1;
// for (int i = 0; i < static_cast<int>(adj_list[current_node].size()); ++i) {
// const int next_node = adj_list[current_node][i];
// if (next_node != parent_node) {
// depth[next_node] = depth[current_node] + 1;
// dfs(adj_list, next_node, current_node);
// subtree_size[current_node] += subtree_size[next_node];
// }
// }
// }
// static void initializeTree(const std::vector<std::vector<int>>& adj_list) {
// N = static_cast<int>(adj_list.size());
// depth = std::vector<int>(N, 0);
// subtree_size = std::vector<int>(N, 0);
// for (logN = 0; (1 << logN) < N; ++logN) {}
// parent = std::vector<std::vector<int>>(logN, std::vector<int>(N, 0));
// dfs(adj_list, 0, 0);
// for (int i = 1; i < logN; ++i) {
// for (int j = 0; j < N; ++j) {
// parent[i][j] = parent[i - 1][parent[i - 1][j]];
// }
// }
// }
// static int getLowestCommonAncestor(int X, int Y) {
// if (depth[X] < depth[Y]) {
// std::swap(X, Y);
// }
// for (int i = logN - 1; i >= 0; --i) {
// if (depth[parent[i][X]] >= depth[Y]) {
// X = parent[i][X];
// }
// }
// if (X == Y) {
// return X;
// }
// for (int i = logN - 1; i >= 0; --i) {
// if (parent[i][X] != parent[i][Y]) {
// X = parent[i][X];
// Y = parent[i][Y];
// }
// }
// return parent[0][X];
// }
// static int getDistance(int X, int Y) {
// return depth[X] + depth[Y] - 2 * depth[getLowestCommonAncestor(X, Y)];
// }
// static int attractionsBehind(int X, int Y) {
// if (X == Y) {
// return N;
// }
// for (int i = logN - 1; i >= 0; --i) {
// if (depth[parent[i][X]] > depth[Y]) {
// X = parent[i][X];
// }
// }
// if (Y == parent[0][X]) {
// return N - subtree_size[X];
// }
// return subtree_size[Y];
// }
// static void checkFunTour(const std::vector<int>& fun_tour) {
// if (static_cast<int>(fun_tour.size()) != N) {
// wrongAnswer("Invalid size");
// }
// std::vector<bool> visited_attractions(N, false);
// for (int i = 0; i < N; ++i) {
// if (fun_tour[i] < 0 || fun_tour[i] >= N) {
// wrongAnswer("Invalid index");
// }
// if (visited_attractions[fun_tour[i]]) {
// wrongAnswer("Repeated index");
// }
// visited_attractions[fun_tour[i]] = true;
// }
// int last_travel_time = getDistance(fun_tour[0], fun_tour[1]);
// for (int i = 2; i < N; ++i) {
// int travel_time = getDistance(fun_tour[i - 1], fun_tour[i]);
// if (travel_time > last_travel_time) {
// wrongAnswer("Tour is not fun");
// }
// last_travel_time = travel_time;
// }
// }
// } // namespace tree_helper
// static int N, Q;
// int hoursRequired(int X, int Y) {
// if (--Q < 0) {
// wrongAnswer("Too many queries");
// }
// if (X < 0 || X >= N || Y < 0 || Y >= N) {
// wrongAnswer("Invalid index");
// }
// return tree_helper::getDistance(X, Y);
// }
// int attractionsBehind(int X, int Y) {
// if (--Q < 0) {
// wrongAnswer("Too many queries");
// }
// if (X < 0 || X >= N || Y < 0 || Y >= N) {
// wrongAnswer("Invalid index");
// }
// return tree_helper::attractionsBehind(X, Y);
// }
vector<int> createFunTour(int N, int Q) {
// assert(N<=500);
vector<int>ans(N), pode(N,1);
vector<vector<int>>dist(N,vector<int>(N,0));
for(int i=0;i<N;++i){
for(int j=i+1;j<N;++j){
dist[i][j] = dist[j][i] = hoursRequired(i,j);
}
}
int best = 0, x = 0;
for(int i=0;i<N;++i)if(dist[0][i]>dist[0][best])best = i;
for(int i=0;i<N;++i)if(dist[best][i]>dist[best][x])x = i;
for(int i=0;i<N;++i){
ans[i] = best, pode[best] = 0, best = -1;
for(int i=0;i<N;++i){
if(pode[i]&&(best==-1||dist[x][i]>dist[x][best]))best = i;
}
swap(x,best);
}
return ans;
}
// int main() {
// assert(2 == scanf("%d %d", &N, &Q));
// std::vector<std::vector<int>> adj_list(N);
// for (int i = 0; i < N - 1; ++i) {
// int A, B;
// assert(2 == scanf("%d %d", &A, &B));
// adj_list[A].push_back(B);
// adj_list[B].push_back(A);
// }
// tree_helper::initializeTree(adj_list);
// std::vector<int> fun_tour = createFunTour(N, Q);
// tree_helper::checkFunTour(fun_tour);
// for (int i = 0; i < N; ++i) {
// printf("%d%c", fun_tour[i], " \n"[i == N - 1]);
// }
// return 0;
// }
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