#include "stations.h"
#include <bits/stdc++.h>
using namespace std;
void dfs(int u, int p, int dep, vector<vector<int>>& adj, vector<int>& labels, int& lab) {
if (dep % 2 == 0) labels[u] = ++lab;
for (int v : adj[u]) {
if (v == p) continue;
dfs(v, u, dep + 1, adj, labels, lab);
}
if (dep % 2 == 1) labels[u] = ++lab;
}
std::vector<int> label(int n, int k, std::vector<int> u, std::vector<int> v) {
vector<vector<int>> adj;
vector<int> labels;
int lab = 0;
adj.resize(n);
labels.resize(n);
for (int i = 0; i < n - 1; i++) {
adj[u[i]].push_back(v[i]);
adj[v[i]].push_back(u[i]);
}
dfs(0, -1, 0, adj, labels, lab);
return labels;
}
int find_next_station(int s, int t, std::vector<int> c) {
if (s < c[0]) { // even
for (int i = 0; i + 1 < c.size(); i++) {
if (t <= c[i]) return c[i];
}
return c.back();
}
for (int i = c.size() - 1; i >= 1; i--) {
if (t >= c[i]) return c[i];
}
return c[0];
}
