#include "chameleon.h"
#include <cstdio>
#include <cstdlib>
#include <bits/stdc++.h>
using namespace std;
using vi = vector<int>;
int Query(const std::vector<int> &p);
void Answer(int a, int b);
void Solve(int N) {
vector<bool>fnd(2*N+1, 0);
vi grp[2*N+1];
for(int i=1; i<=2*N; ++i) {
for(int j=i+1; j<=2*N; ++j) {
vi p;
p.push_back(i); p.push_back(j);
int res = Query(p);
if(res == 1) {
grp[i].push_back(j);
grp[j].push_back(i);
}
}
}
for(int i=1; i<=2*N; ++i) {
if(fnd[i]) continue;
int siz = (int)grp[i].size();
if(siz == 1) {
Answer(i, grp[i][0]);
fnd[i] = fnd[grp[i][0]] = 1;
} else {
vi p;
p.push_back(i);
p.push_back(grp[i][0]);
p.push_back(grp[i][1]);
int res = Query(p);
if(res == 1) swap(grp[i][0], grp[i][2]);
else {
p.pop_back();
p.push_back(grp[i][2]);
res = Query(p);
if(res == 1) swap(grp[i][0], grp[i][1]);
}
}
}
for(int i=1; i<=2*N; ++i) {
if(fnd[i]) continue;
int x = grp[i][1];
if(fnd[x] or grp[x][0] == i) x = grp[i][2];
Answer(x, i);
fnd[x] = fnd[i] = 1;
}
}
