#include "meetings.h"
#include<bits/stdc++.h>
using namespace std;
#define int long long
#define F first
#define S second
#define all(x) x.begin(),x.end()
#define pii pair<int,int>
#define pb push_back
#define sz(x) (int)(x.size())
#define chmin(x,y) x=min(x,y)
#define chmax(x,y) x=max(x,y)
#define vi vector<int>
#define vp vector<pii>
#define vvi vector<vi>
#define ykh mt19937_64 rng(chrono::steady_clock::now().time_since_epoch().count())
#define __lg(x) 63-__builtin_clzll(x)
#define pow2(x) (1LL<<x)
void __print(int x) {cerr << x;}
void __print(float x) {cerr << x;}
void __print(double x) {cerr << x;}
void __print(long double x) {cerr << x;}
void __print(char x) {cerr << '\'' << x << '\'';}
void __print(const char *x) {cerr << '\"' << x << '\"';}
void __print(const string &x) {cerr << '\"' << x << '\"';}
void __print(bool x) {cerr << (x ? "true" : "false");}
template<typename T, typename V>
void __print(const pair<T, V> &x) {cerr << '{'; __print(x.first); cerr << ','; __print(x.second); cerr << '}';}
template<typename T>
void __print(const T &x) {int f = 0; cerr << '{'; for (auto &i: x) cerr << (f++ ? "," : ""), __print(i); cerr << "}";}
void _print() {cerr << "]\n";}
template <typename T, typename... V>
void _print(T t, V... v) {__print(t); if (sizeof...(v)) cerr << ", "; _print(v...);}
#ifdef local
void setio(){freopen("/Users/iantsai/Library/Mobile Documents/com~apple~CloudDocs/cpp/Empty.md","r",stdin);}
#define debug(x...) cerr << "[" << #x << "] = ["; _print(x)
#else
void setio(){}
#define debug(x...)
#endif
mt19937 rng(time(0));
int K;
bool cmp(int a,int b){
return query(K,a,b)==a;
}
void qq(int a,int b){
if(a>b)swap(a,b);
qq(a,b);
}
void go(int k,vector<int>temp){
if(sz(temp)==0)return;
int n=sz(temp);
int k2=rng()%n;
K=k;
vector<int>child[n],path;
for(auto i:temp){
int p=query(k,k2,i);
if(p==i){
path.pb(i);
}
else{
child[p].pb(i);
}
}
sort(all(path),cmp);
for(int i=0;i<n;i++){
if(!i){
qq(k,path[i]);
}
else{
qq(path[i-1],path[i]);
}
}
go(k,child[k]);
for(auto i:path){
go(i,child[i]);
}
}
void solve(int N){
int n=N;
int k=rng()%n;
vector<int>temp;
for(int i=0;i<n;i++){
if(i!=k)temp.pb(i);
}
go(k,temp);
}
/*
input:
*/
Compilation message
meetings.cpp: In function 'bool cmp(long long int, long long int)':
meetings.cpp:45:12: error: 'query' was not declared in this scope; did you mean 'Query'?
45 | return query(K,a,b)==a;
| ^~~~~
| Query
meetings.cpp: In function 'void go(long long int, std::vector<long long int>)':
meetings.cpp:58:15: error: 'query' was not declared in this scope; did you mean 'Query'?
58 | int p=query(k,k2,i);
| ^~~~~
| Query
