#include "stations.h"
#include <bits/stdc++.h>
using namespace std;
vector<int> label(int n, int k, vector<int> u, vector<int> v)
{
vector<int>labels(n);
for (int i = 0; i < n; i++)
{
labels[i] = i;
}
return labels;
}
int ischild(int targetchild,int parent)
{
if (parent == targetchild) return true;
while (parent >= targetchild)
{
parent = (parent - 1) / 2;
if (parent == targetchild) return true;
}
return false;
}
int find_next_station(int s, int t, vector <int> c)
{
if (c.size() == 1) return c[0];
else if(s == 0){
if (ischild(c[0],t)) return c[0];
return c[1];
}
else
{
if (ischild(c[1],t)) return c[1];
if (c.size() == 3 && ischild(c[2],t)) return c[2];
return c[0];
}
}
