This submission is migrated from previous version of oj.uz, which used different machine for grading. This submission may have different result if resubmitted.
#include "meetings.h"
#include<bits/stdc++.h>
using namespace std;
const int MAXN=302;
vector<int> G[MAXN], V[MAXN];
int LCA[MAXN][MAXN];
bool isRoot[MAXN];
void FindEdges(int x){
for(auto i:V[x]) isRoot[i]=1;
for(auto i:V[x]){
for(auto j:V[x]){
if(i!=j&&LCA[i][j]!=x&&LCA[i][j]!=i){
isRoot[i]=0;
}
}
}
for(auto i:V[x]){
if(isRoot[i]){
G[x].push_back(i);
for(auto j:V[x]){
if(i!=j&&LCA[i][j]==i){
V[i].push_back(j);
}
}
}
}
}
void dfs(int x){
FindEdges(x);
for(auto i:G[x]){
dfs(i);
}
}
void Solve(int N) {
for(int i=1;i<N;i++){
for(int j=i+1;j<N;j++){
int x=Query(0,i,j);
LCA[i][j]=LCA[j][i]=x;
}
}
for(int i=1;i<N;i++) V[0].push_back(i);
dfs(0);
for(int i=0;i<N;i++){
for(auto j:G[i]){
//cout<<i<<" "<<j<<"\n";
Bridge(i,j);
}
}
}
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