#include "stations.h"
#include <bits/stdc++.h>
#define fore(i,a,b) for(lli i = (a), abcdxd = (b); i < abcdxd; i++)
#define sz(s) (int((s).size()))
#define all(v) (v).begin(), (v).end()
#define pb push_back
using namespace std;
typedef int lli;
typedef vector<lli> vi;
// const lli N = 1e3 + 5;
vector<vi> adj;
vi labels;
lli t = 0;
void dfs(lli u, lli p){
for(auto & i : adj[u]) if (i != p) dfs(i, u);
cout << u << ": " << t << endl;
labels[u] = t; t++;
}
std::vector<int> label(int n, int k, std::vector<int> u, std::vector<int> v) {
labels.resize(n);
adj.resize(n);
fore(i,0,n-1){
lli 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, std::vector<int> c) {
// sort(all(c));
lli tt = s; swap(tt, c[sz(c)-1]);
// cout << s << ' ' << t << endl;
// for (auto & i : c) cout << i << ' '; cout << endl;
// cout << "---" << endl;
fore(i,0,sz(c)-1) if (c[i] <= t and t < c[i+1]) return c[i];
return tt;
}
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