I Understood Every LeetCode Solution But Couldn’t Solve Anything: My DSA Learning Reality
Feb 12 · 5 min read · I wake up at 6 AM every day. Not because I’m a morning person, but because I have a goal: crack FAANG interviews. I’m a CS student who started learning Data Structures and Algorithms on February 4th, 2026. I study 4 hours daily before college. I’m d...
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Breadth First Search (BFS): for Undirected Unweighted Graph
Jan 6 · 6 min read · BFS Traversal — 4 Easy Rules Rule 1 — Start Put the starting vertex into a queue. Keep an empty visited set. Rule 2 — Take from Queue While the queue is not empty: Remove the front vertex from the queue. ⚠️ Key difference from BFSBFS → Queu...
Join discussionLinked List Data Structure ( Part - A )
Jan 3 · 6 min read · লিঙ্কড লিস্ট হচ্ছে একধরনের লিনিয়ার ডাটা স্ট্রাকচার যেখানে ডাটা একটার পর একটা সিরিয়ালি থাকে। তবে লিঙ্কড লিস্ট Consecutive Memory Location ফলো করে না। অর্থাৎ , মেমরিতে সিরিয়ালি ডাটাগুলো স্টোর হয় না। মেমরি তে বিভিন্ন জায়গায় ডাটা স্টোর হয়। লিঙ্কড লিস্ট ড...
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Arrays and Lists
Dec 23, 2025 · 3 min read · Both array and list are types of data structure that stores a collection of elements. The array has a fixed size while lists are dynamic and can have their size updated during runtime. This main difference directly influences the usage of memory and ...
Join discussionHeaps, Priority Queues, and Heapsort
Nov 18, 2025 · 10 min read · Imagine a hospital ER triage system where you must constantly identify the most critical patient amidst a continuous stream of new arrivals; this scenario requires a data structure that handles priority efficiently, not just arrival order. Standard a...
Join discussionWhen You See Abstract Structures, Design Becomes Easier
Nov 8, 2025 · 3 min read · While developing an e-commerce system, I once designed a model called DeliveryDateConstraint to represent delivery restrictions decided by sellers. At first, it looked simple enough: each product had its own shipping rule.But later I realised that cu...
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125 Essential Problems from LeetCode
Oct 22, 2025 · 7 min read · Arrays (10 problems) Master the fundamentals of array manipulation, from basic traversals to advanced techniques. Easy Problems Best Time to Buy and Sell Stock (#121) - Single pass tracking Maximum Subarray (#53) - Kadane's algorithm Plus One (#66...
Join discussion🌟 Welcome to Learning With Action Hey Learners! 👋
Oct 5, 2025 · 1 min read · Welcome to Learning With Action, a space where curiosity meets consistency and ideas turn into results. Here, we believe that true learning doesn’t stop at understanding — it begins when you take action. Every concept you practice, every problem you ...
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