struct Node
{
    Node* left;
    int const value;
    Node* right;
};

int main()
{
    Node* temp { new Node {nullptr, 8, nullptr} };
    Node* curr { new Node {nullptr, 2, nullptr} };
    curr->left = new Node {nullptr, 4, temp};
    curr->right = new Node {temp, 5, nullptr};
    curr->right->right = new Node {nullptr, 7, nullptr};
}