Deletion The following is pseudo-code for deletion. Deletion in AVL Tree if (empty subtree) { set success false return } // end if if (deleteKey < root) { leftSubtree=AVLDelete (left subtree, deleteKey, success) if (tree shorter) { leftSubtree deleteRightBalance (root) } // end if elseif (deleteKey > root) { rightSubtree=AVLDelete (root->right, deleteKey, success) if (tree shorter) delete LeftBalance (root) root }// end elseif } else { delete node; } // end else

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Write a simple C++ program to simulate the deletion algorithm.
### Deletion

The following is pseudo-code for deletion.

#### Deletion in AVL Tree

```pseudo
if (empty subtree)
{
    set success false
    return
} // end if

if (deleteKey < root)
{
    leftSubtree = AVLDelete (left subtree, deleteKey, success)
    if (tree shorter)
    {
        leftSubtree = deleteRightBalance (root)
    } // end if
}
elseif (deleteKey > root)
{
    rightSubtree = AVLDelete (root->right, deleteKey, success)
    if (tree shorter)
    {
        root = deleteLeftBalance (root)
    } // end elseif
}
else
{
    delete node;
} // end else
```

Explanation of Steps:

1. **Check for Empty Subtree:**  
   If the subtree is empty, the deletion is unsuccessful and the function returns.

2. **Key Comparison:**  
   Compare the `deleteKey` with the `root` key.
   
   - **If `deleteKey` is less than `root`:** 
     - Recursively call `AVLDelete` on the left subtree with the `deleteKey`.
     - Check if the tree height becomes shorter.
       - If so, apply the `deleteRightBalance` on the `root`.
   
   - **If `deleteKey` is greater than `root`:**
     - Recursively call `AVLDelete` on the right subtree with the `deleteKey`.
     - Check if the tree height becomes shorter.
       - If so, apply the `deleteLeftBalance` on the `root`.

3. **Key Found:**
   - If the `deleteKey` matches the `root` key, delete the node.

This pseudo-code ensures that the AVL tree maintains its balanced property after the deletion operation.
Transcribed Image Text:### Deletion The following is pseudo-code for deletion. #### Deletion in AVL Tree ```pseudo if (empty subtree) { set success false return } // end if if (deleteKey < root) { leftSubtree = AVLDelete (left subtree, deleteKey, success) if (tree shorter) { leftSubtree = deleteRightBalance (root) } // end if } elseif (deleteKey > root) { rightSubtree = AVLDelete (root->right, deleteKey, success) if (tree shorter) { root = deleteLeftBalance (root) } // end elseif } else { delete node; } // end else ``` Explanation of Steps: 1. **Check for Empty Subtree:** If the subtree is empty, the deletion is unsuccessful and the function returns. 2. **Key Comparison:** Compare the `deleteKey` with the `root` key. - **If `deleteKey` is less than `root`:** - Recursively call `AVLDelete` on the left subtree with the `deleteKey`. - Check if the tree height becomes shorter. - If so, apply the `deleteRightBalance` on the `root`. - **If `deleteKey` is greater than `root`:** - Recursively call `AVLDelete` on the right subtree with the `deleteKey`. - Check if the tree height becomes shorter. - If so, apply the `deleteLeftBalance` on the `root`. 3. **Key Found:** - If the `deleteKey` matches the `root` key, delete the node. This pseudo-code ensures that the AVL tree maintains its balanced property after the deletion operation.
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