#include "stations.h"
#include <bits/stdc++.h>
using namespace std;
vector<int> label(int n, int k, vector<int> u, vector<int> v) {
vector<vector<int>> adj(n);
for (int i=0; i<n-1; i++) {
adj[u[i]].push_back(v[i]);
adj[v[i]].push_back(u[i]);
}
int start=-1;
for (int i=0; i<n; i++){
if (adj[i].size()==1){
start=i;
break;
}
}
vector<int> lbl(n, -1);
int prev=-1, cur=start;
int id=0;
while (true) {
lbl[cur]=id++;
int nxt=-1;
for (int x : adj[cur])
if (x!=prev)
nxt=x;
if (nxt==-1) break;
prev=cur;
cur=nxt;
}
return lbl;
}
int find_next_station(int s, int t, vector <int> c){
if(c.size()==1){
return c[0];
}else if(t<s){
return c[0];
}else{
return c[1];
}
}
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