What does this C++ snippet output?

1#include <iostream>
2 
3struct Shape { virtual int sides() = 0; };
4struct Triangle : Shape { int sides() override { return 3; } };
5struct Pentagon : Shape { int sides() override { return 5; } };
6int main() {
7    Shape* shapes[] = { new Triangle(), new Pentagon() };
8    int total = 0;
9    for (auto s : shapes) total += s->sides();
10    std::cout << total << "\n";
11    for (auto s : shapes) delete s;
12}