#include "doll.h"
#ifndef EVAL
#include "grader.cpp"
#endif
#include <bits/stdc++.h>
using namespace std;
vector<int> C, X, Y;
int mx = 2;
vector<bool> tree((1 << 18) + 5, true);
void rec(int index, int value)
{
if (index >= mx / 2)
{
if (tree[index])
X[index - 1] = value;
else
Y[index - 1] = value;
}
else if (tree[index])
rec(index * 2, value);
else
rec(index * 2 + 1, value);
tree[index] = !tree[index];
}
void create_circuit(int M, std::vector<int> A)
{
int N = A.size();
while (mx < N)
mx *= 2;
X.resize(mx - 1);
fill(X.begin(), X.end(), -1);
Y = X;
C.resize(M + 1);
fill(C.begin(), C.end(), -1);
C[0] = A[0];
for (int i = 1; i < mx / 2; i++)
{
X[i - 1] = i * -2;
Y[i - 1] = i * -2 - 1;
}
for (int i = 1; i < N; i++)
rec(1, A[i]);
Y[Y.size() - 1] = 0;
answer(C, X, Y);
}
