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Learn Linked List with visual DSA lessons

Learn Linked List with 5 DSA patterns and 29 visual lessons. Follow step-by-step animations and synced C#, Python, and Java code.

A linked list is a chain of nodes joined by links.

Basic Operations

Search, insert, delete, and reconnect individual nodes.

Search in Linked List Easy · Visible link rewiring
Insert at Head / Tail / Nth Position Easy · Visible link rewiring
Delete Head / Tail / Nth Node Easy · Visible link rewiring
Intersection of Two Linked Lists Easy · Visible link rewiring
Design Linked List Medium · Visible link rewiring
Odd–Even Linked List Medium · Visible link rewiring

Fast and Slow Pointers

Move two pointers at different speeds to reveal hidden structure.

Middle of the Linked List Easy · Visible link rewiring
Linked List Cycle Easy · Visible link rewiring
Linked List Cycle II Medium · Visible link rewiring
Remove Nth Node From End Medium · Visible link rewiring

Reversal Pattern

Reverse all or part of a list by changing pointer direction.

Reverse a Linked List Easy · Visible link rewiring
Palindrome Linked List Easy · Visible link rewiring
Reverse Linked List II (between m & n) Medium · Visible link rewiring
Maximum Twin Sum of a Linked List Medium · Visible link rewiring
Swap Nodes in Pairs Medium · Visible link rewiring
Rotate List (circular linkedlist) Medium · Visible link rewiring
Reverse Nodes in k-Group Hard · Visible link rewiring

Merge / Sort

Split, merge, sort, and regroup nodes by reconnecting chains.

Merge Two Sorted Lists Easy · Visible link rewiring
Remove Duplicates from Sorted List Easy · Visible link rewiring
Sort List Medium · Visible link rewiring
Reorder List Medium · Visible link rewiring
Remove Duplicates from Sorted List II Medium · Visible link rewiring
Partition List Medium · Visible link rewiring
Merge K Sorted Lists Hard · Visible link rewiring

LinkedList with Stack/HashMap

Add a stack or map when one-way links are not enough.

Add Two Numbers Medium · Visible link rewiring
Add Two Numbers II Medium · Visible link rewiring
Next Greater Node in Linked List Medium · Visible link rewiring
Remove Nodes From Linked List Medium · Visible link rewiring
Copy List with Random Pointer Medium · Visible link rewiring