Linked List Study Guide

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Basic Operations

Traversal and Modification

• 🟨 82. Remove Duplicates from Sorted List II [Solution]
• 🟩 83. Remove Duplicates from Sorted List [Solution]
• 🟨 725. Split Linked List in Parts [Solution]
• 🟨 2058. Find the Minimum and Maximum Number of Nodes Between Critical Points [Solution]
• 🟨 3217. Delete Nodes From Linked List Present in Array [Solution]

Reversal Operations

• 🟩 206. Reverse Linked List [Solution]
• 🟨 92. Reverse Linked List II [Solution]
• 🟥 25. Reverse Nodes in k-Group [Solution]

Node Operations

• 🟨 24. Swap Nodes in Pairs [Solution]
• 🟨 86. Partition List [Solution]
• 🟨 328. Odd Even Linked List
• 🟨 2807. Insert Greatest Common Divisors in Linked List [Solution]

Two-Pointer Technique

Fast and Slow Pointers

• 🟩 876. Middle of the Linked List [Solution]
• 🟩 234. Palindrome Linked List [Solution]
• 🟨 143. Reorder List [Solution]

Cycle Detection

• 🟩 141. Linked List Cycle [Solution]

Other Two-Pointer Applications

• 🟨 19. Remove Nth Node From End of List [Solution]
• 🟨 61. Rotate List [Solution]

Advanced Operations

Merging and Arithmetic

• 🟩 21. Merge Two Sorted Lists [Solution]
• 🟨 2. Add Two Numbers [Solution]

Deep Copy

• 🟨 138. Copy List with Random Pointer [Solution]

Special Structures

Doubly Linked List

• 🟨 146. LRU Cache [Solution]

Problem Difficulty Legend

• 🟩 Easy
• 🟨 Medium
• 🟧 Medium-Hard
• 🟥 Hard
• ⬛ Very Hard

Additional Resources

• Linked List Data Structure (Video)
• Linked List Implementation in Python
• Linked List vs Array Performance Analysis