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What is the maximum height of an AVL tree with p nodes?

Question

What is the maximum height of an AVL tree with p nodes?

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Solution

The maximum height of an AVL tree with p nodes is approximately 1.44 * log2(p+2) - 0.328. Here are the steps to derive this:

  1. An AVL tree is a self-balancing binary search tree, and the height of the AVL tree is always log2(n).

  2. However, because an AVL tree is self-balancing, the height is the minimum possible, which is not always the case for a regular binary search tree.

  3. The exact formula for the height h of an AVL tree with p nodes is derived from the Fibonacci sequence: p = F(h+2) - 1, where F is the Fibonacci function.

  4. Solving this equation for h gives the maximum height of an AVL tree with p nodes: h = logφ(p+2) - 2, where φ is the golden ratio (approximately 1.61803).

  5. However, this formula gives the height in terms of the golden ratio and the Fibonacci sequence, which is not very practical.

  6. A more practical approximation is h =

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