#include "doll.h"
#include <bits/stdc++.h>
using namespace std;
#define pb push_back
void create_circuit(int M, std::vector<int> A) {
int N = A.size();
vector<int> adj[M];
for(int i = 0; i<N; i++){
if(i<N-1)
adj[A[i]-1].pb(A[i+1]);
else adj[A[i]-1].pb(0);
}
vector<int> res(M+1), x, y;
int switchcnt = 0;
res[0] = A[0];
for(int i = 0; i<M; i++){
if(adj[i].size()==1) res[i+1] = adj[i][0];
if(adj[i].size()==2){
switchcnt++;
res[i+1] = -switchcnt;
x.pb(adj[i][0]);
y.pb(adj[i][1]);
}
if(adj[i].size()>2){
switchcnt++;
res[i+1] = -switchcnt;
switchcnt++; x.pb(-switchcnt);
switchcnt++; y.pb(-switchcnt);
x.pb(adj[i][0]);
if(adj[i].size()==3) {
y.pb(-switchcnt+2);
x.pb(adj[i][1]);
y.pb(adj[i][2]);
}
else{
y.pb(adj[i][1]);
x.pb(adj[i][2]);
y.pb(adj[i][3]);
}
}
}
answer(res,x,y);
}
