AVL Algorithm Revisited

• Recursive

1. Search downward for

spot

2. Insert node

3. Unwind stack,

correcting heights

a. If imbalance #1,

single rotate

b. If imbalance #2,

double rotate

• Iterative

1. Search downward for

spot, stacking

parent nodes

2. Insert node

3. Unwind stack,

correcting heights

a. If imbalance #1,

single rotate and

exit

b. If imbalance #2,

double rotate and

exit

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