#include "gondola.h"
#include<bits/stdc++.h>
using namespace std;
typedef long long ll;
typedef double ld;
typedef pair<int,int> pii;
typedef pair<ll,ll> pll;
typedef complex<ld> point;
void debug_out(){cerr << endl;}
template<typename Head, typename... Tail>
void debug_out(Head H, Tail... T){
cout << H << ' ';
debug_out(T...);
}
#define debug(...) cerr << "(" << #__VA_ARGS__ << "): ", debug_out(__VA_ARGS__)
#define F first
#define S second
#define all(x) x.begin(), x.end()
#define MP(x, y) make_pair(x, y)
int valid(int n, int a[]){
int idx = -1;
for (int i = 0; i < n; i++){
if (a[i] <= n) idx = i;
}
if (idx == -1) return -1;
vector<int> v;
idx -= (a[idx] - 1);
for (int i = 0; i < n; i++){
v.push_back(a[(idx+i)%n]);
}
for (int i = 0; i < n; i++){
if (v[i] <= n && v[i] != i+1) return 0;
}
return 1;
}
//----------------------
int replacement(int n, int gondolaSeq[], int replacementSeq[])
{
return -2;
}
//----------------------
int countReplacement(int n, int inputSeq[])
{
return -3;
}
