#include <bits/stdc++.h>
using namespace std;
//#define int long long
#define pi pair<int, int>
#define pii pair<int, pi>
#define fi first
#define se second
#ifdef _WIN32
#define getchar_unlocked _getchar_nolock
#endif
mt19937_64 rng(chrono::steady_clock::now().time_since_epoch().count());
int S[1005], back[1005], c = 1;
vector <int> adj[1005];
void dfs(int x, int par){
S[x] = c++;
for(auto i : adj[x])if(i != par)dfs(i, x);
}
int findEgg (int N, vector < pair < int, int > > bridges)
{
for(int i = 1; i <= N; i++)adj[i].clear();
for(auto [i, j] : bridges)adj[i].push_back(j), adj[j].push_back(i);
dfs(1, -1);
for(int i = 1; i <= N; i++)back[S[i]] = i;
int lo = 1, hi = N, ans = hi;
while(lo <= hi){
int mid = (lo + hi) >> 1;
vector <int> v;
for(int i = 1; i <= mid; i++)v.push_back(back[i]);
if(query(v))ans = mid, hi = mid - 1;
else lo = mid + 1;
}
return back[ans];
}
Compilation message
eastereggs.cpp: In function 'int findEgg(int, std::vector<std::pair<int, int> >)':
eastereggs.cpp:34:6: error: 'query' was not declared in this scope
34 | if(query(v))ans = mid, hi = mid - 1;
| ^~~~~
