Consider Figure 12.15, an instance of LR rotation. Figure 12.15(a) shows the balanced AVL search tree
prior to insertion. A er inserting I as the right subtree of the le subtree of the closest ancestor G, the bal-
ance factor of the nodes in the path from the root to the newly inserted node is changed. e balance factor of
nodes G and H has been changed from 0 to –1 and node P has been changed from +1 to +2. is leads to the
imbalance of the tree as shown in Figure 12.15(b). Invoke LR rotation, this shi s H up into the place of P and P
is pushed down as its right subtree along with S. N ...
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