Latest Articles
Discover our latest posts and insights from the Kode$word journey
Remove Nth Node From End – The Smart Way to Solve in One Pass (LeetCode 19)
Stop Counting Twice! Learn the Two-Pointer Trick to Remove Nodes Efficiently from the End of a Linked List
Reverse LinkedList (LeetCode 206) – The One Trick That Changes Everything
From Confusion to Clarity: Master Linked List Reversal with Intuition, Visualization, and Clean Logic
LeetCode 328: Odd Even Linked List – Clean and Easy Explanation with Multiple Approaches
Learn How to Rearrange a Linked List by Odd and Even Positions Using Optimal O(1) Space Approach
LeetCode 2: Add Two Numbers – Step-by-Step Linked List Addition Explained Clearly
Learn How to Add Numbers Represented as Linked Lists Using Carry Logic, Dummy Nodes, and Iterative Traversal (Beginner Friendly Guide)
LeetCode 203: Remove Linked List Elements – Step-by-Step Guide for Beginners
Learn How to Remove Nodes from a Linked List Using Iteration, Edge Case Handling, and Dummy Node Technique (With Clear Intuition)
LeetCode 290: Word Pattern – Multiple Ways to Verify Bijection Between Pattern Characters and Words
Learn How to Solve the Word Pattern Problem Using HashMaps, Bidirectional Mapping, and Index Mapping Techniques
LeetCode 123 — Best Time to Buy and Sell Stock III | At Most Two Transactions Explained
From left-right prefix DP to the elegant four-variable state machine — a complete guide to the hardest constraint in the stock series.
LeetCode 122 — Best Time to Buy and Sell Stock II | Every Approach Explained
From greedy intuition to peak-valley thinking — a complete guide to maximizing stock profit with unlimited transactions.
LeetCode 121 — Best Time to Buy and Sell Stock I | Two Pointer / Sliding Window Explained
A beginner-friendly breakdown of the classic stock profit problem — intuition, dry run, commented Java code, and complexity analysis.