PROBLEM OF THE DAY : 04/07/2024 | Duplicate Subtrees

Welcome to the daily solving of our PROBLEM OF THE DAY with Yash Dwivedi. We will discuss the entire problem step-by-step and work towards developing an optimized solution. This will not only help you brush up on your concepts of Tree but also build up problem-solving skills.

Given a binary tree, your task is to find all duplicate subtrees from the given binary tree.

Duplicate Subtree : Two trees are duplicates if they have the same structure with the same node values.

Note:  Return the root of each tree in the form of a list array & the driver code will print the tree in pre-order tree traversal in lexicographically increasing order.

Examples:

Input : 
               1
              /  \
            2     3
          /      /  \
        4     2      4
             /
          4

Output: 2  4   
               4
Explanation: The above tree have two duplicate subtrees.i.e 
  2
 /
4  and 4. Therefore, you need to return the above tree root in the form of a list.

Give the problem a try before going through the video. All the best!!!
Problem Link: https://practice.geeksforgeeks.org/problems/duplicate-subtrees/1