Concord AVL

Write a program to maintain AVL tree.

Input: use a file, AVLinput.txt

+ 3 means inserting 3 into the current AVL tree if the new value is not in the current AVL tree.

- 5 means deleting 5 from the current AVL tree if 5 is in the AVL tree.

Output:

1. Print out the type of rotation for each insert/deleting operation, if it does.

2. A list of distinct words with their frequencies in an ascending order by using inorder traversal method.

3. A list of values in the same format of Figure 4.7 in the text (pp. 105) using a preorder traversal method.

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