Submission #387825

#	TimeUTC-0	Username	Problem	Language	Result	Execution time	Memory
387825	2021-04-09 08:59:21	WLZ	Stations (IOI20_stations)	C++14	100 / 100	897 ms	852 KiB

stations

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#include "stations.h"
#include <bits/stdc++.h>
using namespace std;
int dfs_cnt = 0;
vector< vector<int> > g;
vector<int> d, dfs_in, dfs_out;
void dfs(int u, int p) {
  dfs_in[u] = dfs_cnt++;
  for (auto& v : g[u]) {
    if (v != p) {
      d[v] = d[u] + 1;
      dfs(v, u);
    }
  }
  dfs_out[u] = dfs_cnt++;
}
vector<int> label(int n, int k, vector<int> u, vector<int> v) {
  g.assign(n, {});
  d.assign(n, 0);
  for (int i = 0; i < n - 1; i++) {
    g[u[i]].push_back(v[i]);
    g[v[i]].push_back(u[i]);
  }
  dfs_in.assign(n, 0); dfs_out.assign(n, 0);
  dfs(0, -1);
  set<int> st;
  for (int i = 0; i < n; i++) {
 
 
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• Subtask 1: 5 / 5
• Subtask 2: 8 / 8
• Subtask 3: 16 / 16
• Subtask 4: 10 / 10
• Subtask 5: 61 / 61