#include "doll.h"
#include<bits/stdc++.h>
#define lcm(a,b) (a/__gcd(a,b))*b
#define fast ios_base::sync_with_stdio(false);cin.tie(0);cout.tie(0);
#define ll long long int
#define vi vector<int>
#define vll vector<ll>
#define pb push_back
#define F first
#define S second
#define mp make_pair
//salida rapida "\n"
//DECIMALES fixed<<sp(n)<<x<<endl;
//gcd(a,b)= ax + by
//lCB x&-x
//set.erase(it) - ersases the element present at the required index//auto it = s.find(element)
//set.find(element) - iterator pointing to the given element if it is present else return pointer pointing to set.end()
//set.lower_bound(element) - iterator pointing to element greater than or equal to the given element
//set.upper_bound(element) - iterator pointing to element greater than the given element
// | ^
//__builtin_popcount(x)
using namespace std;
void create_circuit(int m,vi A) {
int n = A.size();
vi C(m + 1,-1);
vi vis(m+1,0);
C[0]=A[0];
int num=0;
for(int i=0;i<n;i++)vis[A[i]]++;
for(int i=1;i<=m;i++){
if(vis[i]==2)num++;
if(vis[i]==0)C[i]=i;
}
vi S(m+1,-1);
int cnt=0;
vi X(num),Y(num);
for(int i=0;i<n;i++){
if(vis[A[i]]==1){
if(i==n-1){
C[A[i]]=0;continue;
}
C[A[i]]=A[i+1];
}else{
if(S[A[i]]==-1){
S[A[i]]=-cnt;
X[cnt]=A[i+1];
cnt++;
}else{
int aux=S[A[i]];
if(i==n-1){
Y[aux]=0;
}else{
Y[aux]=A[i+1];
}
}
}
}
for(int i=0;i<=m;i++){
//cout<<C[i]<<" ";
} //cout<<endl;
answer(C, X, Y);
}
//3 4 1 2 1 3
