The O(n) Club: Word Search II: Why Your Brute Force Solution Needs an Intervention
The O(n) Club: Word Search II—Why Your Brute Force Solution Needs an Intervention ⚡ TL;DR Want to find every dictionary word in a letter grid,…
The Mutex Club: User vs Kernel Threads: Know the Difference
Introduction Welcome to the ring where user threads and kernel threads duke it out for CPU time, bragging rights, and your sanity. Think of…
The Mutex Club: Daemon Threads: Background Heroes of Java
Imagine your Java application as a Broadway production. Your user threads are the divas hitting high notes, and daemon threads are the…
The O(n) Club: Reverse Linked List II — Now With 100% More Pointer Regret
The O(n) Club: Reverse Linked List II — Now With 100% More Pointer Regret ⚡ TL;DR A classic linked list headache: given a 1-indexed singly…
The O(n) Club: Swap Nodes in Pairs — No, You Can’t Just Swap Values
The O(n) Club: Swap Nodes in Pairs — No, You Can’t Just Swap Values ⚡ TL;DR Take a singly linked list and actually swap every pair of…
The Mutex Club: Multithreading Demystified
Overview Welcome to the ultimate smackdown: multithreading vs multiprocessing. Imagine your application as a kitchen. Threads are the…
The Mutex Club: Taming Thread Priorities for Smarter Scheduling
Key Insights ### What Is Priority Inversion? Imagine a culinary competition: the star chef (high-priority thread) is ready to plate, but their…
The O(n) Club: Nodes at Distance K in Binary Trees — Now With Bonus Parent Trouble
The O(n) Club: Nodes at Distance K in Binary Trees — Now With Bonus Parent Trouble ⚡ TL;DR You need all nodes exactly K edges away from your…
The O(n) Club: Counting Bits: Why Loop When You Can Cheat?
The O(n) Club: Counting Bits: Why Loop When You Can Cheat? ⚡ TL;DR Given n, return an array of the number of 1’s (set bits) in each…
The O(n) Club: Add Two Numbers, Linked Lists, and That Sneaky Carry
The O(n) Club: Add Two Numbers, Linked Lists, and That Sneaky Carry ⚡ TL;DR Two linked lists. Digits in reverse. Add ’em, digit by…