#include "stations.h"
#include <bits/stdc++.h>
#define pb push_back
#define pf push_front
using namespace std;
#define F first
#define S second
typedef long long ll;
#define pii pair <int, int>
#define pll pair <ll, ll>
typedef long double ld;
const ll N = 2000 + 100, M = 4096 + 10, len = 21, inf = 1e18;
const ll mod = 1e9 + 7;
ll um(ll a, ll b){
return (1LL * a * b) % mod;
}
ll subr(ll a, ll b){
return ((1LL * a - b) % mod + mod) % mod;
}
int pos[N];
vector <int> q[N];
void dfs1(int v, int pred, int cnt){
pos[v] = cnt;
for(auto u : q[v]){
if(u == pred) continue;
dfs1(u, v, cnt + 1);
}
}
void dfs2(int v, int pred, int cur){
if(cur == -1){
pos[v] = 0;
cur = 1;
for(auto u : q[v]){
dfs2(u, v, cur);
cur += 1000;
}
return;
}
pos[v] = cur;
for(auto u : q[v]){
if(u == pred) continue;
dfs2(u, v, cur + 1);
}
}
vector<int> label(int n, int k, vector<int> u, vector<int> v) {
vector <int> labels(n);
for(int i = 0; i < (int)u.size(); i++){
q[u[i]].pb(v[i]);
q[v[i]].pb(u[i]);
}
bool w2 = false;
for(int i = 0; i < n; i++){
if((int)q[i].size() >= 3){
dfs2(i, -1, -1);
w2 = true;
break;
}
}
if(w2 == false){
for(int i = 0; i < n; i++){
if((int)q[i].size() == 1){
dfs1(i, -1, 1);
break;
}
}
}
for(int i = 0; i < n; i++){
labels[i] = pos[i];
q[i].clear();
}
return labels;
}
int find_next_station(int s, int t, vector<int> c) {
int from = s/1000 + 1, to = s/1000 + 1000;
if(from <= t && t <= to){
if(t > s) return s + 1;
else return s - 1;
}
if(s == from) return 0;
return s - 1;
}
