//Challenge: Accepted
#include <bits/stdc++.h>
using namespace std;
#ifdef zisk
void debug(){cout << endl;}
template<class T, class ... U> void debug(T a, U ... b){cout << a << " ", debug(b...);}
template<class T> void pary(T l, T r){
while (l != r)cout << *l << " ", l++;
cout << endl;
}
#else
#define debug(...) 0
#define pary(...) 0
#endif
#define ll long long
#define maxn 100005
#define pii pair<int, int>
#define ff first
#define ss second
#include "gondola.h"
int valid(int n, int a[]) {
int ret = 1, st = -1;
for (int i = 0;i < n;i++) {
if (a[i] > n) continue;
int val = (a[i] - i - 1 + n) % n;
if (st == -1) st = val;
else if (val != st) {
ret = 0;
break;
}
}
sort(a, a + n);
for (int i = 1;i < n;i++) {
if (a[i] == a[i-1]) ret = 0;
}
return ret;
}
//----------------------
int replacement(int n, int gondolaSeq[], int replacementSeq[]) {
return -2;
}
//----------------------
int countReplacement(int n, int inputSeq[]) {
return -3;
}
