#include <bits/stdc++.h>
#include "gondola.h"
using namespace std;
#define all(x) (x).begin(), (x).end()
#define ll long long int
#define pii pair <int, int>
#define pb push_back
#define ff first
#define ss second
const int N = 1e5+5;
int T[N], replacementSeq[N];
int valid(int n, int A[]){
map<int,int> mp;
int pos = -1;
for (int i = 0; i < n; i++){
if (mp[A[i]]++) return 0;
if (A[i] <= n){pos = i;break;}
}
if (pos == -1) return 1;
int x = A[pos];
for (int i = pos; i < n; i++){
if (i > pos and mp[A[i]]++) return 0;
if (A[i] <= n and A[i] != x) return 0;
x++;
if (x == n+1) x = 1;
}
return 1;
}
int replacement(int n, int A[], int replacementSeq[]){
int x = valid(n, A);
assert(x);
for (int i = 0; i < n; i++){
T[i] = i+1;
}
int pos = -1;
for (int i = 0; i < n; i++){
if (A[i] <= n){pos = i;break;}
}
// cout << pos;
if (pos != -1){
int x = A[pos];
for (int i = pos; i >= 0; i--){
T[i] = x;
x--;
if (!x) x = n;
}
x = A[pos];
for (int i = pos; i < n; i++){
T[i] = x;
x++;
if (x == n+1) x = 1;
}
}
int mx = 0, ind = 0;
map <int,int> idx;
for (int i = 0; i < n; i++){
idx[A[i]] = i+1;
if (mx < A[i]){
mx = A[i];
ind = i;
}
}
for (int i = n+1; i <= mx; i++){
if (idx[i]){
replacementSeq[i-n-1] = T[idx[i]-1];
}else{
replacementSeq[i-n-1] = T[ind];
T[ind] = i;
}
}
// for (int i = 0; i < mx-n; i++) cout << replacementSeq[i] << " ";
// cout << mx-n << '\n';
return mx-n;
}
int countReplacement(int n, int inputSeq[])
{
return -3;
}
// int main ()
// {
// ios::sync_with_stdio(false);
// cin.tie(0);
// int n;
// cin >> n;
// int A[n];
// for (int i = 0; i < n; i++) cin >> A[i];
// int m = replacement(n, A, replacementSeq);
// for (int i = 0; i < m; i++) cout << replacementSeq[i] << " ";
// }
