#include <bits/stdc++.h>
#include "doll.h"
using namespace std;
#define MAXS 400'000
void create_circuit(int M, vector<int> A) {
int N = A.size();
vector<int> C(M + 1, -1), X(MAXS), Y(MAXS);
int cnt = 0;
auto get_idx = [&](int sw) {
return abs(sw) - 1;
};
auto rec = [&](auto &&rec, int l, int r) {
if ((1 << (int)ceil(log2(N + 1))) - r > N) return -1;
if (r - l == 1) return 0;
int node_idx = --cnt;
int lc = rec(rec, l, (l + r + 1) / 2);
int rc = rec(rec, (l + r + 1) / 2, r);
X[get_idx(node_idx)] = lc;
Y[get_idx(node_idx)] = rc;
return node_idx;
};
rec(rec, 0, 1 << (int)ceil(log2(N + 1)));
X.resize(abs(cnt));
Y.resize(abs(cnt));
vector<int> status(abs(cnt));
for (int i = 0; i <= N; i++) {
int curr = -1;
for (;;) {
status[get_idx(curr)] ^= 1;
int next = status[get_idx(curr)] ? X[get_idx(curr)] : Y[get_idx(curr)];
if (next == 0) {
int sus = i == N ? 0 : A[i];
if (status[get_idx(curr)]) X[get_idx(curr)] = sus;
else Y[get_idx(curr)] = sus;
break;
}
curr = next;
}
}
answer(C, X, Y);
}
