#include "chameleon.h"
#include <bits/stdc++.h>
using namespace std;
//int Query(const std::vector<int> &p)
//void Answer(int a, int b)
const int MAXN = 1024;
int n;
vector<int>g[MAXN];
bool vis[MAXN];
/*
4
0 0 0 0 1 1 1 1
1 2 3 4 1 2 3 4
6 7 8 5 2 3 4 1
*/
int in[MAXN],ou[MAXN];
vector<int>p;
vector<int> subred(int l, int r)
{
vector<int>res;
for(int i = l; i <= r; i++) res.push_back(i);
return res;
}
int bin_s(int i, pair<int,int> bef)
{
int l = n+1;
int r = 2*n;
int mid;
while(l <= r)
{
mid = (l+r)/2;
for(int j = n+1; j <= 2*n; j++) if(j != bef.first && j != bef.second) p.push_back(j);
p.push_back(i);
if(Query(p) <= p.size()-1) r = mid-1;
else l = mid+1;
}
return l;
}
void SOLVE4(int i)
{
p = subred(n+1,2*n);
p.push_back(i);
int gr = 3;
if(Query(p) == p.size() - 1) gr = 1;
pair<int,int>bef = {-1,-1};
for(int j = 0; j < gr; j++)
{
int pos = bin_s(i,bef);
g[i].push_back(pos);
g[pos].push_back(i);
bef.second = bef.first;
bef.first = pos;
}
}
void Solve(int N)
{
n = N;
if(n <= 50)
{
for(int i = 1; i <= 2*n; i++)
{
for(int j = i+1; j <= 2*n; j++)
{
if(Query({i,j}) == 1)
{
g[i].push_back(j);
g[j].push_back(i);
}
}
}
}
else
{
for(int i = 1; i <= n; i++) SOLVE4(i);
}
for(int i = 1; i <= 2*n; i++)
{
if(g[i].size() == 1)
{
if(!vis[i] && !vis[g[i][0]]) Answer(i,g[i][0]);
vis[i] = 1;
vis[g[i][0]] = 1;
continue;
}
int ab = Query({i,g[i][0],g[i][1]});
int ac = Query({i,g[i][0],g[i][2]});
int bc = Query({i,g[i][1],g[i][2]});
if(ab == ac) in[g[i][0]] = i;
if(ab == bc) in[g[i][1]] = i;
if(bc == ac) in[g[i][2]] = i;
}
for(int i = 1; i <= 2*n; i++) ou[in[i]] = i;
for(int i = 1; i <= 2*n; i++)
{
if(vis[i]) continue;
for(int j = 0; j < 3; j++)
{
if(j > g[i].size()-1) break;
if(g[i][j] != in[i] && g[i][j] != ou[i])
{
if(!vis[i] && !vis[g[i][j]]) Answer(i,g[i][j]);
vis[i] = 1;
vis[g[i][j]] = 1;
break;
}
}
}
}
