Main.cc: In function ‘int main()’:
Main.cc:11:5: error: ‘cin’ was not declared in this scope
cin >> n;
^~~
Main.cc:11:5: note: suggested alternative:
In file included from Main.cc:4:0:
/usr/include/c++/7/iostream:60:18: note: ‘std::cin’
extern istream cin; /// Linked to standard input
^~~
Main.cc:17:4: error: ‘cout’ was not declared in this scope
cout <