Main.cc: In function ‘int main()’:
Main.cc:5:2: error: ‘cin’ was not declared in this scope
    5 |  cin>>n;
      |  ^~~
Main.cc:1:1: note: ‘std::cin’ is defined in header ‘<iostream>’; did you forget to ‘#include <iostream>’?
  +++ |+#include <iostream>
    1 | using namespace std;
Main.cc:13:3: error: ‘cout’ was not declared in this scope
   13 |   cout<<arr[i]*arr[i]<<" "<<arr[i]*arr[i]*arr[i]<<endl;
      |   ^~~~
Main.cc:13:3: note: ‘std::cout’ is defined in header ‘<iostream>’; did you forget to ‘#include <iostream>’?
Main.cc:13:51: error: ‘endl’ was not declared in this scope
   13 |   cout<<arr[i]*arr[i]<<" "<<arr[i]*arr[i]*arr[i]<<endl;
      |                                                   ^~~~
Main.cc:1:1: note: ‘std::endl’ is defined in header ‘<ostream>’; did you forget to ‘#include <ostream>’?
  +++ |+#include <ostream>
    1 | using namespace std;