docs: update README.md file

Author: viniciusferreira7

README.md

@@ -15,9 +15,21 @@ A collection of algorithm implementations in **TypeScript**, focusing on clarity
 
 ### Sliding Window
 * [🔗 **Maximum Length Substring**](src/array/two-pointer/sliding-window/maximum-length-substring-with-two-occurrences.ts) - Dynamic window optimization
+* [🔗 **Contains Nearby Duplicate**](src/array/two-pointer/sliding-window/contains-nearby-duplicate.ts) - Window-based duplicate detection
+
+### Hash Map Patterns
+* [🔗 **Two Sum**](src/array/two-pointer/hash-map/two-sum.ts) - Finding pairs that sum to target
+
+### Linked List Algorithms
+* [🔗 **Reverse Linked List**](src/linked-list/reverse-linked-list.ts) - Iterative and recursive reversal
+* [🔗 **Middle of the Linked List**](src/linked-list/middle-of-the-linked-list.ts) - Find middle node using slow-fast pointers
+* [🔗 **Floyd Cycle Detection**](src/linked-list/floyd-cycle-detection.ts) - Detect cycles in linked lists
+* [🔗 **Merge Two Sorted Lists**](src/linked-list/merge-two-sorted-lists.ts) - Merge sorted linked lists
+
+### Data Structures
+* [🔗 **Doubly Linked List**](src/linked-list/doubly-linked-list.ts) - Bidirectional linked list implementation
+* [🔗 **List Node**](src/linked-list/list-node.ts) - Basic node structure for linked lists
 
-### Hash Map Patterns  
-* [🔗 **Two Sum**](src/array/two-pointer/hashmap/two-sum.ts) - Finding pairs that sum to target
 ---
 
 ## 🛠 Tech Stack