Submission #589821

#	TimeUTC-0	Username	Problem	Language	Result	Execution time	Memory
589821	2022-07-05 10:29:32	Lucpp	Stations (IOI20_stations)	C++17	100 / 100	916 ms	756 KiB

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#include "stations.h"
#include <bits/stdc++.h>
using namespace std;
vector<vector<int>> g;
int cnt;
vector<int> labels;
void dfs(int u, int par, bool b){
  if(b) labels[u] = cnt++;
  for(int v : g[u]){
    if(v == par) continue;
    dfs(v, u, !b);
  }
  if(!b) labels[u] = cnt++;
}
vector<int> label(int n, int k, vector<int> u, vector<int> v) {
  cnt = 0;
  g.clear();
  g.resize(n);
  for(int i = 0; i < n-1; i++){
    g[u[i]].push_back(v[i]);
    g[v[i]].push_back(u[i]);
  }
  labels.assign(n, -1);
  dfs(0, -1, true);
  return labels;
}
 
 
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• Subtask 1: 5 / 5
• Subtask 2: 8 / 8
• Subtask 3: 16 / 16
• Subtask 4: 10 / 10
• Subtask 5: 61 / 61