Submission #616185

#	Time	Username	Problem	Language	Result	Execution time	Memory
616185		John3_141592	Stations (IOI20_stations)	C++14	Compilation error	0 ms	0 KiB

stations

#include "stations.h"
#include <bits/stdc++.h>

using namespace std;

vector <int> grafo[1003];
map <int,bool> mapa;
int arr[1003];
bool vis[1003];

void dfs1(int node,int c){
    vis[node]=true,arr[node]=c;
    for(auto i:grafo[node]) if(!vis[i]) dfs1(i,c+1);
}

void dfs2(int node,int c){
    vis[node]=true,arr[node]=c;
    for(auto i:grafo[node]) if(!vis[i]) dfs2(i,c-1);
}

std::vector<int> label(int n, int k, std::vector<int> u, std::vector<int> v) {
    if(n==2){
        vector <int> vec;
        vec.push_back(0);
        vec.push_back(1);
        return vec;
    }
    mapa.clear();
    for(int i=0;i<n;i++) grafo[i].clear();
    for(int i=0;i<n-1;i++){
        grafo[u[i]].push_back(v[i]);
        grafo[v[i]].push_back(u[i]);
    }
    int a=-1,b=-1,c=-1;
    for(int i=0;i<n;i++){
        if(grafo[i].size()==1){
            if(a==-1) a=i;
            else b=i;
        }
        if(grafo[i].size()>2) c=i;
    }
    if(c==-1) c=grafo[a][0];
    else{
        for(auto i:grafo[c]) mapa[i]=true;
        a=-1,b=-1;
        for(int i=0;i<n;i++){
            if(grafo[i].size()==1 && !mapa.count(i)){
                if(a==-1) a=i;
                else b=i;
            }
        }
        if(a==-1){
            for(auto i:grafo[c]){
                if(grafo[i].size()!=1) continue;
                if(a==-1) a=i;
                else b=i;
            }
        }
        else if(b==-1){
            for(auto i:grafo[c]){
                if(grafo[i].size()!=1) continue;
                if(b==-1) b=i;
            }
        }
    }
    fill(arr,arr+n+1,0);
    fill(vis,vis+n+1,false);
    vis[c]=true;
    int aux=0;
    dfs1(a,0);
    for(int i=0;i<n;i++) if(vis[i] && i!=c) aux++;
    dfs2(b,n-1);
    arr[c]=aux++;
    for(int i=0;i<n;i++) if(!vis[i]) arr[i]=aux++;
    vector <int> solve;
    for(int i=0;i<n;i++) solve.push_back(arr[i]);
    return solve;
}

Compilation message (stderr)

/usr/bin/ld: /tmp/ccNKKGOH.o: in function `main':
stub.cpp:(.text.startup+0x4cc): undefined reference to `find_next_station(int, int, std::vector<int, std::allocator<int> >)'
collect2: error: ld returned 1 exit status