Submission #312006

#	TimeUTC-0	Username	Problem	Language	Result	Execution time	Memory
312006	2020-10-12 06:21:58	htc001	Stations (IOI20_stations)	C++14	100 / 100	1085 ms	1140 KiB

stations

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#include<bits/stdc++.h>
#include "stations.h"
using namespace std;
const int N=1005;
int tme;
vector<int> lab;
vector<int> nei[N];
void dfs(int x,int p,int lv){
  if(lv) lab[x-1]=tme++;
  for(int i=0;i<int(nei[x].size());i++){
    int to=nei[x][i];
    if(to!=p) dfs(to,x,lv^1);
  }
  if(!lv) lab[x-1]=tme++;
}
vector<int> label(int n,int k,vector<int> u,vector<int> v){
  lab.clear();
  lab.resize(n);
  tme=0;
  for(int i=0;i<N;i++) nei[i].clear();
  for(int i=0;i<n-1;i++){
    u[i]++;v[i]++;
//    printf("%d %d\n",u[i],v[i]);
    nei[u[i]].push_back(v[i]);
    nei[v[i]].push_back(u[i]);
  }
  dfs(1,-1,0);
 
 
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• Subtask 1: 5 / 5
• Subtask 2: 8 / 8
• Subtask 3: 16 / 16
• Subtask 4: 10 / 10
• Subtask 5: 61 / 61