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Hi Everyone, this is the 10th video of our Playlist "Trie : Popular Interview Problems".
Now we will be solving a very good trie Problem - Delete Duplicate Folders in System | Super Detailed Explanation | Leetcode 1948 | codestorywithMIK

I will explain it in full detail so that it becomes easy to understand. Each line will be explained and you will know the WHY behind everything.

Problem Name : Delete Duplicate Folders in System | Super Detailed Explanation | Leetcode 1948 | codestorywithMIK
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Leetcode Link - https://leetcode.com/problems/delete-...


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Video Summary :
The solution uses a trie-like structure to manage folder paths, representing each folder as a node. First, paths are inserted into the trie. The populateNodes function generates a string representation of subfolder structures, storing occurrence counts in subFolderMap. Duplicates are removed based on these counts, ensuring only unique folder structures remain. Finally, construstResult reconstructs the folder paths from the trie, providing the filtered list of non-duplicate folders.

✨ Timelines✨
00:00 - Introduction
0:15 - Motivation
0:38 - Problem Explanation
5:49 - Thought Process
17:58 - Creating Trie
22:42 - Populating Trie Nodes
32:01 - Most Important Example-1 (Why Sorting ?)
35:26 - Most Important Example-2 (How to preserve structure ?)
45:38 - Removing Duplicates
54:26 - Constructing Result
1:01:19 - Coding it up

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