#include "grader.h"
#include <bits/stdc++.h>
using namespace std;
vector<int> graph[513], ord;
void dfs(int node = 0, int parent = -1) {
ord.push_back(node+1);
for (int i : graph[node])
if (i != parent) dfs(i, node);
}
int findEgg(int N, vector<pair<int, int>> bridges) {
for (int i = 1; i <= N; i++) graph[i].clear();
ord.clear();
for (pair<int, int> i : bridges) {
graph[i.first-1].push_back(i.second-1);
graph[i.second-1].push_back(i.first-1);
}
queue<int> q;
q.push(0);
// vector<bool> vis(N+1);
bitset<1024> vis;
while (!q.empty())
{
int x{q.front()};
q.pop(); vis[x]=1;
ord.push_back(x+1);
for (auto i:graph[x])
{
if (!vis[i])
{
q.push(i);
}
}
}
int l = 0, r = N - 1;
while (l != r) {
int mid = (l + r + 1) / 2;
if (query(vector<int>(ord.begin(), ord.begin() + mid))) r = mid - 1;
else l = mid;
}
return ord[l];
}
