Added AVL tree (JAVA) with additional functionalities

matthewsamuel95 / ACM-ICPC-Algorithms

Algorithms used in Competitive Programming

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Added AVL tree (JAVA) with additional functionalities #933

Closed avcbcoder closed 6 years ago

avcbcoder commented 6 years ago

I have added 4-5 additional functionality of avl trees commonly used in competitive programming like justSmaller, justGreater, count of smaller,bigger elements, unique elements.... all with O(logN) complexity.