Why i am getting fatal error.
#include<bits/stdc++.h>using namespace std;vector<int>v[1005];int i,n;int a[1005];bool vis[1005];int count1=0;void per(int j){v[count1].push_back(j);vis[j]=true;if(!vis[a[j]]){per(a[j]);}}int main(){cin>>n;for(i=1;i<=n;i++)cin>>a[i];
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