#include "stations.h"
#include <bits/stdc++.h>
using namespace std;
#define MAXI (int)1e3+10
vector<int> ad[MAXI];
vector<int> labels;
// 1 .. 1e3
// 1e3+1 ... 2e3
void dfs(int x,int e){
if(e > 0){
labels[x] = labels[e]+1e3;
}
for(auto s: ad[x]){
if(s == e) continue;
dfs(s,x);
}
}
vector<int> label(int n, int k, vector<int> u, vector<int> v) {
labels.assign(n,0);
for(int i = 0;i<MAXI;i++) ad[i].clear();
for(int i = 0;i<n-1;i++){
ad[u[i]].push_back(v[i]);
ad[v[i]].push_back(u[i]);
}
int start = 0;
for(int i = 0;i<n;i++){
if(ad[i].size() >= 3){
start = i;
break;
}
}
int cnt = 1;
for(auto s: ad[start]){
labels[s] = cnt;
cnt++;
}
labels[start] = 0;
dfs(start,-1);
return labels;
}
int find_next_station(int s, int t, std::vector<int> c) {
if(s%1000 != t%1000){
if(s == 0) return t%1000;
return s > 999 ? s-1e3 : 0;
}
return s > t ? s-1e3 : s+1e3;
}
