The O(n) Club: Combination Sum II — Now With Extra Duplicate Chaos
The O(n) Club: Combination Sum II — Now With Extra Duplicate Chaos ⚡ TL;DR Solve for all unique combos in an array (duplicates everywhere!)…
The O(n) Club: Word Break II — Memoization vs. Recursive Meltdown
The O(n) Club: Word Break II — Memoization vs. Recursive Meltdown ⚡ TL;DR Split a string into all valid sentences using a dictionary. Brute…
Threading Models in HFT: The Chess Grandmasters of Nano-Second Trading
Why Threading Runs the HFT Show Picture an F1 pit stop, but in your server room: that’s threading in high-frequency trading (HFT).…
The Mutex Club: Thread Pools to the Rescue
Key Insights on Multithreading in Web Servers # The Hidden Engine: Why Multithreading? Imagine your CPU as a lone chef trying to cook five…
The O(n) Club: Unique Permutations Without The Awkward Duplicates
The O(n) Club: Unique Permutations Without The Awkward Duplicates ⚡ TL;DR Your regular permutation code doesn’t handle duplicates—it just…
The O(n) Club: Squares of a Sorted Array—Why Squaring Wrecks Your Sort (and How Two Pointers Play Cleanup)
The O(n) Club: Squares of a Sorted Array—Why Squaring Wrecks Your Sort (and How Two Pointers Play Cleanup) ⚡ TL;DR Got a sorted array? Need a…
The Mutex Club: Mastering Mutexes, Futures & Structured Concurrency 🔒
Key Insights # Mutex: The Natural Bouncer Think of a mutex as the velvet rope outside an exclusive club: only one thread in at a time. This…
The O(n) Club: Counting Primes That Actually End Before N (and Your Sanity Leaves)
The O(n) Club: Counting Primes That Actually End Before N (and Your Sanity Leaves) ⚡ TL;DR The real LeetCode ask: count all prime numbers…
The Mutex Club: Taming Async Pipelines Without 3AM Fire Drills
Key Insights # Async Pipelines: The Jittery Rube Goldberg Combining multiple asynchronous workflows can feel like wiring a Rube Goldberg…
The O(n) Club: First Unique Character in a String—How to Outsmart a Classic Interview Trap
The O(n) Club: First Unique Character in a String—How to Outsmart a Classic Interview Trap ⚡ TL;DR You want the index of the first…