제출 #552382

#제출 시각아이디문제언어결과실행 시간메모리
552382hoanghq2004즐거운 행로 (APIO20_fun)C++14
0 / 100
1 ms212 KiB
#include <bits/stdc++.h>
#pragma GCC optimize ("O3")
#pragma GCC optimize ("unroll-loops")
#include <ext/pb_ds/assoc_container.hpp>
#include <ext/pb_ds/tree_policy.hpp>
#include "fun.h"

using namespace __gnu_pbds;
using namespace std;

template <typename T>
using ordered_set = tree <T, null_type, less <T>, rb_tree_tag, tree_order_statistics_node_update>;

mt19937 gen(std :: chrono :: system_clock :: now().time_since_epoch().count());

const int _N = 500;

int d[_N][_N];
int vis[_N];
//
//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) {
    for (int i = 0; i < N; ++i)
        for (int j = 0; j < N; ++j)
            d[i][j] = hoursRequired(i, j);
    int S = 0;
//    for (int i = 0; i < N; ++i)
//        if (d[0][i] > d[0][S]) S = i;
//    int T = 0;
//    for (int i = 0; i < N; ++i)
//        if (d[S][i] > d[S][T]) T = i;
    vector <int> ans;
//    ans.push_back(S);
    vis[S] = 1;
    int T = 0;
    int last = 1e9;
    for (int i = 1; i < N; ++i) {
        for (int i = 0; i < N; ++i)
            if (!vis[i] && d[S][i] > d[S][T] && d[S][i] <= last) T = i;
        vis[T] = 1;
        last = d[S][T];
        ans.push_back(S);

        S = T;
    }
    ans.push_back(T);
    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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