#include "chameleon.h"
#include <bits/stdc++.h>
#ifdef DEBUG
#include "../debug.h"
#else
#define debug(...) void(23)
#endif
namespace {
// int variable_example = 1;
std::vector<int> mtc;
} // namespace
void answer(int a, int b) {
debug("answer:", a, b);
if (mtc[a] != -1) {
assert(mtc[a] == b);
} else {
mtc[a] = b;
mtc[b] = a;
Answer(a + 1, b + 1);
}
}
int query(std::vector<int> v) {
for (auto& i : v) {
i += 1;
}
return Query(v);
}
void Solve(int N) {
// std::vector<int> p(3);
// p[0] = 1;
// p[1] = 2;
// p[2] = 3;
// variable_example = Query(p);
// for (int i = 0; i < N; ++i) {
// Answer(i * 2 + 1, i * 2 + 2);
// }
std::vector<std::vector<int>> adj(2 * N);
for (int i = 0; i < 2 * N; ++i) {
for (int j = i + 1; j < 2 * N; ++j) {
int x = query({i, j});
if (x == 1) {
debug(i, j);
adj[i].emplace_back(j);
adj[j].emplace_back(i);
}
}
}
for (int i = 0; i < 2 * N; ++i) {
debug(i, adj[i]);
}
mtc.assign(2 * N, -1);
for (int i = 0; i < 2 * N; ++i) {
if (adj[i].size() == 1) {
int x = adj[i][0];
auto it = std::find(adj[x].begin(), adj[x].end(), i);
adj[x].clear();
adj[i].clear();
answer(i, x);
}
}
std::vector<std::pair<int, int>> err;
for (int i = 0; i < 2 * N; ++i) {
if (mtc[i] == -1) {
for (auto j : adj[i]) {
bool bad = true;
for (auto k : adj[j]) {
if (k == i) {
continue;
}
std::vector<int> vec = {i, j, k};
debug(i, j, k, query(vec));
if (query(vec) == 1) {
bad = false;
}
}
if (bad) {
err.emplace_back(i, j);
}
}
}
}
for (auto[x, y] : err) {
auto itx = std::find(adj[x].begin(), adj[x].end(), y);
auto ity = std::find(adj[y].begin(), adj[y].end(), x);
if (itx != adj[x].end()) {
adj[x].erase(itx);
}
if (ity != adj[y].end()) {
adj[y].erase(ity);
}
}
for (int i = 0; i < 2 * N; ++i) {
debug(adj[i]);
}
for (int i = 0; i < 2 * N; ++i) {
if (!adj[i].empty()) {
answer(i, adj[i][0]);
}
}
}
