foo.cc: In function 'int main()':
foo.cc:9:9: error: 'vector' was not declared in this scope
    9 |         vector<long long> A(N);
      |         ^~~~~~
foo.cc:2:1: note: 'std::vector' is defined in header '<vector>'; did you forget to '#include <vector>'?
    1 | #include <iostream>
  +++ |+#include <vector>
    2 | using namespace std;
foo.cc:9:16: error: expected primary-expression before 'long'
    9 |         vector<long long> A(N);
      |                ^~~~
foo.cc:10:44: error: 'A' was not declared in this scope
   10 |         for (int i = 0; i < N; i++) cin >> A[i];
      |                                            ^
foo.cc:11:14: error: 'A' was not declared in this scope
   11 |         sort(A.rbegin(), A.rend());
      |              ^
foo.cc:11:9: error: 'sort' was not declared in this scope; did you mean 'short'?
   11 |         sort(A.rbegin(), A.rend());
      |         ^~~~
      |         short