#include <bits/stdc++.h>
using namespace std;
#include "gondola.h"
//int inputSeq[10000];
int valid(int n, int inputSeq[]){
vector<pair<int,int>>v;
set<int>s;
for(int i=0; i<n; i++){
if(inputSeq[i]<=n)v.push_back({inputSeq[i],i});
if(s.find(inputSeq[i])!=s.end()){
return false;
}
s.insert(inputSeq[i]);
}
for(int i=1; i<n; i++){
//if(v[i-1]==1)continue;
if(v[i].first==1){
continue;
}
if(v[i].first-v[i-1].first==v[i].second-v[i-1].second)continue;
return false;
}
return true;
}
int replacement(int n, int gondolaSeq[], int replacementSeq[]){
return 0;
}
int countReplacement(int n, int inputSeq[]){
return 0;
}
