#include "stations.h"
//#include "stub.cpp"
#include <bits/stdc++.h>
using namespace std;
#define pb push_back
vector<int> label(int n, int k,vector<int> u, vector<int> v) {
vector<vector<int>> g(n);
for(int i=0;i<n-1;i++){
g[u[i]].pb(v[i]);
g[v[i]].pb(u[i]);
}
vector<int> ans(n),d(n,-1);
int cnt=0;
function<void(int)> dfs=[&](int x){
if(d[x]%2==0) ans[x]=cnt++;
for(auto it: g[x]){
if(d[it]!=-1) continue;
d[it]=d[x]+1;
dfs(it);
}
if(d[x]%2) ans[x]=cnt++;
};
d[0]=0;
dfs(0);
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())];
}
}
