#include <bits/stdc++.h>
#include "doll.h"
using namespace std;
int tokill, swcnt;
bool state[400555];
vector<int> X(400555), Y(400555);
void build(int root, int height, bool orientation){
//cout<<root<<" "<<orientation<<" "<<(1<<height)<<" \n";
if((1<<height) <= tokill){
tokill-= (1<<height);
X[root-1] = -1;
return;
}
if(height == 0) {
return;
}
swcnt++;
if (!orientation) {
X[root - 1] = -swcnt;
} else {
Y[root - 1] = -swcnt;
}
int aux = swcnt;
build(aux, height - 1, 0);
build(aux, height - 1, 1);
}
int nextElement;
void dfs(int root){
if(!state[(-root)-1]){
// X
state[-root-1] = !state[-root-1];
if(X[-root-1] >= 0){
X[-root-1] = nextElement;
} else {
dfs(X[-root-1]);
}
}else{
state[-root-1] = !state[-root-1];
if(Y[-root-1] >= 0){
Y[-root-1] = nextElement;
} else {
dfs(Y[-root-1]);
}
}
}
void create_circuit(int M, vector<int> A) {
int N = A.size();
A.push_back(0);
int height = 0;
int aux = N+1;
while((1<<(height)) < aux){
height++;
}
//cout<<height<<"\n";
// exits to kill
tokill = (1<<height) - (N+1);
//cout<<"tokill "<<tokill<<"\n";
swcnt = 1;
build(1, height-1, 0);
build(1, height-1, 1);
vector<int> C (M+1);
for(int i=0; i<=M; ++i){
C[i] = -1;
}
for(int i=0; i<N+1; ++i){
nextElement = A[i];
dfs(-1);
}
X.resize(swcnt);
Y.resize(swcnt);
/*
for(auto el: C){
cout<<el<<" ";
}
cout<<"\n";
for(auto el: X){
cout<<el<<" ";
}
cout<<"\n";
for(auto el: Y){
cout<<el<<" ";
}
cout<<"\n";
*/
answer(C, X, Y);
}
