#include "Memory2_lib.h"
#include<bits/stdc++.h>
using namespace std;
void Solve(int T, int N) {
random_device rd;
mt19937 g(rd());
int M = N+N;
vector<vector<int>> q(M, vector<int>(M, -1));
vector<int> id(M); iota(id.begin(), id.end(), 0);
shuffle(id.begin(), id.end(), g);
array<int, 2> v = {id[0], id[1]};
q[id[0]][id[1]] = Flip(id[0], id[1]);
for(int j=2;j<M;j++) {
int i = id[j];
auto [x, y] = v;
q[x][i] = Flip(x, i);
q[y][i] = Flip(y, i);
if(q[x][i] == q[x][y]) v = {y, i};
else if(q[y][i] == q[x][y]) v = {x, i};
}
Answer(v[0], v[1], q[v[0]][v[1]]);
vector<int> c(N, -1);
for(int i=0;i<M;i++) if(i != v[0] && i != v[1]) {
int u = Flip(i, v[0]);
if(c[u] != -1) Answer(c[u], i, u);
else c[u] = i;
}
}
