#include "stations.h"
#include <bits/stdc++.h>
using namespace std;
#define pb push_back
#define sz(a) (int)a.size()
#define all(a) begin(a),end(a)
using ll = long long;
using vi = vector<int>;
const int mxN = 1010;
int dfs_timer = 0;
vi labels, adj[mxN];
void dfs(int s, int p){
for(auto u : adj[s])
if(u!=p) dfs(u,s);
labels[s] = dfs_timer++;
}
vi label(int n, int k, vi u, vi v) {
labels.clear();
labels.resize(n,0); dfs_timer=0;
for(int i = 0; i < n; i++) adj[i].clear();
for(int i = 0; i < sz(u); i++){
int a = u[i], b = v[i];
adj[a].pb(b), adj[b].pb(a);
}
dfs(0,-1);
return labels;
}
int find_next_station(int s, int t, vi c) {
if(sz(c)==1) return c[0];
for(auto u : c) if(u==t) return u;
if(t>s) return c.back();
bool isRoot = (c.back()<=s);
for(int i = 0; i < sz(c)-2+isRoot; i++)
if(c[i] < t and t < c[i+1]) return c[i+1];
if(isRoot) return c[0];
int sub0 = s-1-c[0];
if(c[0]-sub0+1 <= t and t < c[0]) return c[0];
return c.back();
}
