#include "gondola.h"
#include <bits/stdc++.h>
#pragma GCC target("lzcnt,popcnt")
#pragma GCC optimize("O3,unroll-loops")
//#define int long long
#define pii pair<int,int>
#define vi vector<int>
#define ff first
#define ss second
#define all(x) x.begin(),x.end()
#define sp << " " <<
using namespace std;
int valid(int n, int inputSeq[])
{
vi pos(n+1,-1);
for (int i=0;i<n;i++) {
if (inputSeq[i] <= n) {
if (pos[inputSeq[i]] != -1) return 0;
pos[inputSeq[i]] = i;
}
}
int frst = -1;
int lst = -1,lsty = -1;
for (int j = 1;j<=n;j++) {
if (pos[j] == -1) continue;
if (frst == -1) frst = pos[j];
pos[j] = (pos[j]-frst+n)%n;
if (lst != -1 && pos[j] <= lst) return 0;
if (lst != -1 && pos[j]-lst != j-lsty) return 0;
lst = pos[j];
lsty = j;
}
return 1;
}
//----------------------
int replacement(int n, int gondolaSeq[], int replacementSeq[])
{
return -2;
}
//----------------------
int countReplacement(int n, int inputSeq[])
{
return -3;
}
