struct Node
{
    int const val;
    Node* next;
};

int main()
{
    // Skapa grundstruktur
    Node* curr {new Node{2, nullptr}};
    curr->next = new Node{5, nullptr};
    curr->next->next = new Node{7, nullptr};

    // Sätt in värde 9.
    curr->next->next = new Node {9, curr->next->next};

    // Städa upp
    delete curr->next->next->next;
    delete curr->next->next;
    delete curr->next;
    delete curr;
}