Question: USING JAVA: Solve 4 problems from leetcode.com and discuss the answers. At least one of the problems is of Medium difficulty or higher. All problems

USING JAVA:

Solve 4 problems from leetcode.com and discuss the answers.

At least one of the problems is of Medium difficulty or higher.

All problems require answers that use at least one of the following data structures:

1. Stack

2. Queue

3. Binary Tree

4. Binary Search Tree

5. Linked List

6. Graph

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