The O(n) Club: Implement strStr and Dodge That Haystack Hangover
The O(n) Club: Implement strStr and Dodge That Haystack Hangover ⚡ TL;DR You want to find the first spot where ‘needle’ appears in…
The O(n) Club: Capacity to Ship Packages Within D Days — Goldilocks Goes Binary
The O(n) Club: Capacity to Ship Packages Within D Days — Goldilocks Goes Binary ⚡ TL;DR Given a lineup of stubbornly ordered packages and a…
The Mutex Club: Solving Priority Inversion in Task Scheduling
Key Insights # What Is Priority Inversion? Priority inversion happens when a low-priority task grabs a resource (like a mutex), a…
The Mutex Club: When Threads Just Dance in Circles
Understanding Livelock in Messaging Queues\n\n### The Hallway Tango\nEver seen two people try to pass each other and end up stepping aside…
The O(n) Club: Maximum Length of Repeated Subarray: Why Subsequence Logic Will Betray You
The O(n) Club: Maximum Length of Repeated Subarray — Why Subsequence Logic Will Betray You ⚡ TL;DR Want the length of the longest common chunk…
The O(n) Club: Backspace String Compare, or: Why Your Undo Key Hates You
The O(n) Club: Backspace String Compare, or: Why Your Undo Key Hates You ⚡ TL;DR You have two strings, both infected with more ‘#’…
The Mutex Club: Why Daemon Threads Are Your Silent Debugging Nightmare
TL;DR: The Daemon Thread Trap Daemon threads in Python (and similar runtimes) run in the background but don’t block your process from exiting.…
The Mutex Club: Why Monitors Trump Mutexes for Cleaner Concurrency
Imagine juggling threads with just a mutex—it’s like tap-dancing blindfolded. Monitors not only lock resources but also coordinate threads…
The O(n) Club: Trim a Binary Search Tree—Because Even BSTs Need Spring Cleaning
The O(n) Club: Trim a Binary Search Tree—Because Even BSTs Need Spring Cleaning ⚡ TL;DR You’ve got a BST and strict instructions: keep only…
The O(n) Club: Increasing Triplet Subsequence—When Two Bouncers Are All You Need
The O(n) Club: Increasing Triplet Subsequence—When Two Bouncers Are All You Need ⚡ TL;DR You want to know if there’s an increasing subsequence…