Submission #350170

#	TimeUTC-0	Username	Problem	Language	Result	Execution time	Memory
350170	2021-01-19 03:47:16	tengiz05	Stations (IOI20_stations)	C++17	100 / 100	1154 ms	1400 KiB

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#include "stations.h"
#include <bits/stdc++.h>
using namespace std;
vector<int> edges[1005];
int a[1005];
vector<bool> used;
int timer=0;
void dfs(int u, int d){
  if(d==0)a[u] = timer,timer++;
  used[u] = true;
  for(auto v:edges[u]){
    if(used[v])continue;
    dfs(v,d^1);
  }if(d==1)a[u] = timer,timer++;
}
vector<int> label(int n, int k, vector<int> u, vector<int> v) {
  for(int i=0;i<n;i++)edges[i].clear();
  for(int i=0;i<n-1;i++){
    edges[u[i]].push_back(v[i]);
    edges[v[i]].push_back(u[i]);
  }
  timer=0;
  used.assign(n,0);
  dfs(0,0);
  vector<int> ans(n);
  for(int i=0;i<n;i++)ans[i] = a[i];
  return ans;
}
/*
 
 
 
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• Subtask 1: 5 / 5
• Subtask 2: 8 / 8
• Subtask 3: 16 / 16
• Subtask 4: 10 / 10
• Subtask 5: 61 / 61