Revise links and organize pattern resources

Updated links for Arrays and Linked List sections. Added lists to multiple pattern links for better organization.

Author: ashishps1

README.md

@@ -17,11 +17,10 @@ This repository contains awesome LeetCode resources to learn Data Structures and
 ## 📌 Fundamental Concepts
 - [Algorithmic Complexity](https://blog.algomaster.io/p/57bd4963-462f-4294-a972-4012691fc729)
 - [Big-O Cheat Sheet](https://www.bigocheatsheet.com/)
-- [Arrays](https://www.youtube.com/watch?v=SlNq09scdWE)
+- [Arrays](https://www.youtube.com/watch?v=SlNq09scdWE&list=PLK63NuByH5o9odyBT7nfYkHZyvGQ5oVp2)
 - [Bit Manipulation Techniques](https://blog.algomaster.io/p/c650df76-f978-46ee-a572-eb13c354905d)
 - [Sorting Algorithms](https://medium.com/jl-codes/understanding-sorting-algorithms-af6222995c8)
-- [Linked List](https://leetcode.com/discuss/study-guide/1800120/become-master-in-linked-list)
-  - [Dummy Node Technique](https://blog.algomaster.io/p/5d7a1368-7a0c-461a-93a9-732333ceb2a8)
+- [Linked List](https://www.youtube.com/watch?v=FbHf0ii0WDg&list=PLK63NuByH5o9odyBT7nfYkHZyvGQ5oVp2)
 - [Queues](https://medium.com/basecs/to-queue-or-not-to-queue-2653bcde5b04)
 - [Stacks](https://medium.com/basecs/stacks-and-overflows-dbcf7854dc67)
 - [Hash Tables](https://medium.com/basecs/taking-hash-tables-off-the-shelf-139cbf4752f0)
@@ -44,15 +43,14 @@ This repository contains awesome LeetCode resources to learn Data Structures and
 ## 🚀 Patterns
 - [15 Leetcode Patterns](https://blog.algomaster.io/p/15-leetcode-patterns)
 - [20 DP Patterns](https://blog.algomaster.io/p/20-patterns-to-master-dynamic-programming)
-- [Two Pointers Pattern](https://www.youtube.com/watch?v=QzZ7nmouLTI)
-- [Sliding Window Pattern](https://blog.algomaster.io/p/f4412a17-7a3a-4d0b-8e39-9ea8f429bf7c)
-- [Prefix Sum Pattern](https://www.youtube.com/watch?v=yuws7YK0Yng)
-- [Fast and Slow Pointers Pattern](https://www.youtube.com/watch?v=b139yf7Ik-E)
-- [Top 'K' Elements Pattern](https://www.youtube.com/watch?v=6_v6OoxvMOE)
-- [Kadane's Algorithm](https://www.youtube.com/watch?v=NUWAXbSlsws)
-- [Sliding Window Pattern](https://www.youtube.com/watch?v=y2d0VHdvfdc)
-- [Linked List In-place Reversal Pattern](https://www.youtube.com/watch?v=auoTGovuo9A)
-- [Monotonic Stack Pattern](https://www.youtube.com/watch?v=DtJVwbbicjQ)
+- [Two Pointers Pattern](https://www.youtube.com/watch?v=QzZ7nmouLTI&list=PLK63NuByH5o9odyBT7nfYkHZyvGQ5oVp2)
+- [Sliding Window Pattern](https://www.youtube.com/watch?v=y2d0VHdvfdc&list=PLK63NuByH5o9odyBT7nfYkHZyvGQ5oVp2)
+- [Prefix Sum Pattern](https://www.youtube.com/watch?v=yuws7YK0Yng&list=PLK63NuByH5o9odyBT7nfYkHZyvGQ5oVp2)
+- [Fast and Slow Pointers Pattern](https://www.youtube.com/watch?v=b139yf7Ik-E&list=PLK63NuByH5o9odyBT7nfYkHZyvGQ5oVp2)
+- [Top 'K' Elements Pattern](https://www.youtube.com/watch?v=6_v6OoxvMOE&list=PLK63NuByH5o9odyBT7nfYkHZyvGQ5oVp2)
+- [Kadane's Algorithm](https://www.youtube.com/watch?v=NUWAXbSlsws&list=PLK63NuByH5o9odyBT7nfYkHZyvGQ5oVp2)
+- [Linked List In-place Reversal Pattern](https://www.youtube.com/watch?v=auoTGovuo9A&list=PLK63NuByH5o9odyBT7nfYkHZyvGQ5oVp2)
+- [Monotonic Stack Pattern](https://www.youtube.com/watch?v=DtJVwbbicjQ&list=PLK63NuByH5o9odyBT7nfYkHZyvGQ5oVp2)
 - [Overlapping Intervals Pattern](https://blog.algomaster.io/p/812e72f7-eced-4256-a4c1-00606ae50679)
 - [Backtracking Pattern](https://blog.algomaster.io/p/81d42ca2-600c-4252-aa33-a56462090048)
 - [Modified Binary Search Pattern](https://blog.algomaster.io/p/d0d81b04-4c2a-4b45-a101-5137c3146686)