Chapter 12 Binary Search Trees and AVL Trees | 12.5
Figure 12.4
Insertion of an element 20 in the BST shown in Figure 12.3
12.3.3 DELETION
e three di erent cases in which a node is deleted from a BST are when it
i. is a leaf node
ii. has only one subtree (either le subtree or right subtree)
iii. has both le and right subtrees
Case i: When the node to be deleted is a leaf node then the deletion is simple because only the link eld of its
parent node should be set to NIL. is is illustrated in Figure 12.5(a).
Case ii: When the node to be deleted has either a le or right subtree then the link eld of its parent node
should be set ...
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