AJAbito Juliusinabitojulius.hashnode.dev·14h ago · 6 min readALG1 : What is Algorithm?My first journey into learning and understanding algorithms and data structures starts here. After almost a week of learning the basic theory, from the definition of an algorithm, I summarized and wro00
FOFortunatus Olorunsolainfortunatus-notes.hashnode.dev·14h ago · 10 min readSolving 1920: how to store 2 numbers in 1Check out the problem here. The first and obvious solution to this problem is even in the question: ans[i] = nums[nums[i]]. You loop over the nums array and in each iteration, you just put whatever nu00
ACAlex CutListEngineincutlistengine.hashnode.dev·20h ago · 2 min readA Repeatable QA Workflow for Cut-List OptimizationAn optimizer can produce a compact layout without producing the best workshop plan. A repeatable review workflow keeps the comparison testable and prevents accidental input drift. Freeze the inputs Re00
CCclan cheninalgobite.hashnode.dev·1d ago · 3 min readI kept forgetting interview algorithms, so I built a five-minute practice loopThe frustrating part of algorithm interview prep was not learning a pattern for the first time. It was opening an old problem a few months later and realizing that the pattern had quietly disappeared 00
BSBibash Shresthainbibashshrestha.hashnode.dev·1d ago · 5 min readWiring an IoT Sensor Network for Less with Prim's AlgorithmYou've just finished physically placing five sensors across a field, four sensors and one base station with the actual internet connection back to your server. Every sensor can talk to a few of the ot00
NHNasim Hossain Rabbiinblog.nasimhossain.dev·3d ago · 8 min readHow Twitter Solved Distributed ID Generation"Generating an ID is easy." Is it, though? Every second, companies like Amazon, Stripe, Uber, Discord, and Netflix create millions of new records. Every order, payment, message, notification, and user60
SSolsticioinsolsticio.hashnode.dev·3d ago · 4 min readA daily logic puzzle with no backend at allI built Solsticio, a daily sun/moon logic puzzle in the Binairo/Takuzu family, and I set myself one engineering constraint: no backend. The daily puzzle had to be identical for everyone — on the web, 00
AAnnetinhtml-portfolio.hashnode.dev·5d ago · 4 min readMastering the Two Pointers Technique in Python (With Easy Examples)When I first started solving coding problems, I noticed that many array and string questions looked different but could actually be solved using the same approach: Two Pointers. Instead of using neste00
SSSubham Sahainsubham59036.hashnode.dev·6d ago · 23 min readComplete Beginner to Advanced Level Two Pointer, Sliding Window, Fast & Slow Pointers, Cyclic Sort, Merge Intervals, Two Heaps, Top-K Elements, K-Way Merge, Matrix/Island Traversal — A comprehensive guide in JavaIntroduction Beyond the foundational algorithms (sorting, searching, graph traversals) lies a set of powerful, reusable problem‑solving patterns. These patterns are the secret weapons of efficient cod00
SSSubham Sahainsubham59036.hashnode.dev·6d ago · 20 min readComplete Beginner to Advanced Level Brute Force, Backtracking, Greedy, Divide and Conquer, Recursion, Dynamic Programming (memoization, tabulation, Knapsack, LCS, LIS) — A comprehensive guide in JavaIntroduction Algorithmic paradigms are the mental models that guide problem‑solving. A single programming problem can often be attacked in multiple ways — brute‑force, greedy, divide and conquer, or d00
