Submission #378252

#	TimeUTC-0	Username	Problem	Language	Result	Execution time	Memory
378252	2021-03-16 10:31:12	KoD	Stations (IOI20_stations)	C++17	100 / 100	999 ms	1208 KiB

stations

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#include <bits/stdc++.h>
#include "stations.h"
template <class T>
using Vec = std::vector<T>;
Vec<int> label(int n, int k, Vec<int> u, Vec<int> v) {
  Vec<Vec<int>> graph(n);
  for (int i = 0; i < n - 1; ++i) {
    graph[u[i]].push_back(v[i]);
    graph[v[i]].push_back(u[i]);
  }
  int time = 0;
  Vec<int> ret(n);
  auto dfs = [&](auto dfs, const int u, const int p, const int d) -> void {
    const auto in = time++;
    for (const auto v: graph[u]) {
      if (v != p) {
        dfs(dfs, v, u, d + 1);
      }
    }
    const auto out = time++;
    ret[u] = (d % 2 == 0 ? in : out) / 2;
  };
  dfs(dfs, 0, -1, 0);
  return ret;
}
int find_next_station(int s, int t, Vec<int> c) {
  if (c.size() == 1) {
 
 
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• Subtask 1: 5 / 5
• Subtask 2: 8 / 8
• Subtask 3: 16 / 16
• Subtask 4: 10 / 10
• Subtask 5: 61 / 61