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Paper Towns movie "O" Prisoners Season 5 Episode 6 Movie 720p. Category:Television articles with incorrect naming style Category:Subtitles Category:Cannibalism in fictionQ: Implementing a Binary Search Tree with Recursion I am trying to implement a binary search tree in C++ with the concept of recursion. A node of the tree is defined as: struct Node { int data; Node *left, *right; Node(int d) : data(d), left(nullptr), right(nullptr) { } }; Here's my current recursive function: void add_node(Node * node, int data) { if (node == nullptr) return; if (data > node->data) { node->right = add_node(node->right, data); } else if (data data) { node->left = add_node(node->left, data); } else node->data = data; } My question is, is this a valid implementation of a binary search tree? I am particularly interested in addressing the following concerns: What would the complexity be of this implementation? I noticed that the function above does not perform any checks before adding nodes. Is that a valid implementation? How could I make this code more efficient? I am still fairly new to programming and so I'd appreciate an answer with explanations. A: Yes, that is a valid implementation of a BST. If you want to make it efficient, you need to take a couple of precautions. Firstly, while the most common implementation of a BST is to use a node->left and node->right member, you could use an array of pointers to the elements, with each pointer having a -1 at the end to signal "end of list". Then all you need to do is check that the last pointer points to a nullptr. This is O(1) storage, and O(N) lookup. Secondly, you want to walk the tree looking

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