Day 37/90 |⚡2 Tricky Linked List Interview Problems Explained Step-by-Step | DSA Pattern #5

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🚀 Master Advanced Linked List Manipulation – Two Interview-Favorite Problems Explained!

In this video, we deep dive into two powerful linked list problems that frequently appear in coding interviews and competitive programming:

🔹 Delete M Nodes After Skipping N Nodes
🔹 Reverse Nodes in Even-Length Groups

These problems test your understanding of pointer manipulation, group-based traversal, and in-place linked list updates — all without using extra memory.

🔹 Problem 1: Delete M Nodes After Skipping N Nodes

You’ll learn how to:

Traverse the linked list in controlled chunks

Skip N nodes safely

Delete the next M nodes in-place

Handle edge cases like short lists and remaining nodes

This problem strengthens your ability to modify linked lists selectively while maintaining correct connections.

🔹 Problem 2: Reverse Nodes in Even-Length Groups

In this section, we cover:

How to divide the linked list into increasing group sizes

Detect whether a group length is even or odd

Reverse only the even-sized groups

Maintain list integrity using pointer rewiring

This problem is a fantastic example of conditional in-place reversal and builds intuition for complex linked list patterns.

🧠 Key Concepts Covered

In-place linked list manipulation

Pointer safety & null checks

Group-based traversal logic

Edge case handling

Interview-ready thinking

🎯 Who Should Watch This?

✔️ Students preparing for coding interviews
✔️ Anyone struggling with linked list pointer logic
✔️ Developers aiming to master DSA patterns
✔️ FAANG & product-based company aspirants

📌 By the end of this video, you’ll confidently solve group-based linked list problems without fear of pointer bugs.

👉 Watch till the end, code along, and level up your linked list skills!

Happy Coding 🚀

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CHAPTERS
00:00 - Introduction & Recap
03:17 - Delete N Nodes after M Nodes of a linked list - Theory
15:49 - Delete N Nodes after M Nodes of a linked list - Code
22:49 - LeetCode 2074 - Theory
50:00 - LeetCode 2074 - Code
01:05:00 - LeetCode 2074 - Edge Case
01:12:14 - Conclusion

#DSAPatterns2025 #DSAin90Days #CodingInterviewPreparation #FAANGPreparation #LeetCodePatterns #CTOBhaiya #DSAMastery #DataStructuresAndAlgorithms #CodingInterviewBootcamp #LearnDSA #CodingChallenge #ProblemSolvingPatterns #ZeroToHeroDSA #ThinkInPatterns #90DayDSAChallenge #DSAPlaybook #CrackFAANG #JavaDSA #PythonDSA #CodingJourney #FAANGInterviewPrep #IITianDSACourse #DSACourse2025 #LearnCodeCrack #DSAPlaylist #CrackCodingInterviews #ProgrammingLogic #DSACompleteCourse #DSARevision #DSAStudyPlan

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