#include <iostream>
using namespace std;

class Sample {
    public:
        struct Node {
            bool seen = false;
            int cost = 0;
            int priority = 0;
        };

        Node a;
};

// To execute C++, please define "int main()"
int main() {
  auto words = { "Hello, ", "World!", "\n" };
  for (const string& word : words) {
    cout << word;
  }

  Sample s;
  cout << s.a.priority;

  return 0;
}