#include "rail.h"
#include<bits/stdc++.h>
using namespace std;
int dist[5010][5010];
void dfs(int cur, int pai, int N, int marc[], int location[], int stype[]);
void findLocation(int N, int first, int location[], int stype[])
{
int marc[N];
location[0] = first, stype[0] = 1;
for(int i = 0; i < N; i++)
for(int j = i + 1; j < N; j++)
dist[i][j] = dist[j][i] = getDistance(i, j), marc[i] = 0, marc[j] = 0;
dfs(0, 0, N, marc, location, stype);
return;
}
void dfs(int cur, int pai, int N, int marc[], int location[], int stype[]){
marc[cur] = 1;
set<pair<int, int> > aux;
for(int i = 0; i < N; i++)
if(i != cur) aux.insert(make_pair(dist[cur][i], i));
while(!aux.empty()){
int viz = aux.begin()->second;
aux.erase(aux.begin());
if(viz == pai) continue;
if(marc[viz]) continue;
if(dist[cur][viz] > dist[pai][viz]) continue;
if(stype[cur] == 1) location[viz] = location[cur] + dist[cur][viz], stype[viz] = 2;
else location[viz] = location[cur] - dist[cur][viz], stype[viz] = 1;
dfs(viz, cur, N, marc, location, stype);
}
}
