#include "stations.h"
//#include "stub.cpp"
#include <bits/stdc++.h>
using namespace std;
#define pb push_back
const int N=1005;
vector<int> g[N];
int used[N];
int cnt;
void dfs(int x, int D, vector<int> &v){
if(D%2==0)
v[x]=cnt++;
for(auto it: g[x]){
if(used[it]) continue;
dfs(it,D+1,v);
}
if(D%2)
v[x]=cnt++;
}
vector<int> label(int n, int k,vector<int> u, vector<int> v) {
for(int i=0;i<n-1;i++){
g[u[i]].pb(v[i]);
g[v[i]].pb(u[i]);
}
vector<int> ans(n,0);
used[0]=1;
dfs(0,0,ans);
return ans;
}
int find_next_station(int s, int t, vector<int> c) {
if(s>=c.back()){
if(t>s || t<c[0]) return c[0];
return c[int(lower_bound(c.begin(),c.end(),t+1)-c.begin())-1];
}
else{
if(t<s || t>c.back()) return c.back();
return c[int(lower_bound(c.begin(),c.end(),t)-c.begin())];
}
}
