What does this C++ snippet output?

1#include <iostream>
2 
3struct Visitor;
4struct A {
5  virtual int accept() { return 1; }
6};
7struct B : A {
8  int accept() override { return 2; }
9};
10int total(A** arr, int n) {
11  int s = 0;
12  for (int i = 0; i < n; i++) s += arr[i]->accept();
13  return s;
14}
15int main() {
16    A* arr[] = { new A(), new B(), new B() };
17    std::cout << total(arr, 3) << "\n";
18}