Algorithms & Data Structures

Two years ago I tried to arrange my bookshelf by height, shortest on the left. I had no plan. I just...

Documenting my daily LeetCode journey here! Today's Problem: 1512. Number of...

Array Operations in Java and Scala: Continue reading on Data Science Collective »

Every raindrop on a pond is running the same algorithm you’ve been afraid of. Watch one fall. Continue reading on Medium »

As a Mobile Tech Lead, I’ve often noticed that most Data Structures & Algorithms (DSA) resources are written for general software… Continue reading on Medium »

Chapter 3 — Hash Tables and Hashing Continue reading on Medium »

Chapter 3 — Hash Tables and Hashing Continue reading on Medium »

Koko loves bananas, and there are several piles of them. She can decide her eating speed (k bananas/hour) and wants to finish all the… Continue reading on Mediu

Intuition Manacher's Algorithm leverages the symmetry of palindromes to avoid redundant...

Every cloud service needs power. AWS has data centers, Azure has regions, GCP has zones — and they're...

Have you ever wondered how your computer shrinks massive files down so they don’t absolutely wreck your hard drive? Continue reading on Medium »

Day 4 is here. Product of Array Except Self is on the chopping block: Continue reading on Medium »

In 2025 a paper proved you can compute shortest paths asymptotically faster than Dijkstra. I built a verified implementation on a 2012… Continue reading on Medi

In 2025 a paper proved you can compute shortest paths asymptotically faster than Dijkstra. I built a verified implementation on a 2012… Continue reading on Medi

Most algorithm practice is a pile of random problems. You get reps, but you never build a mental map of the techniques. So I built… Continue reading on AnotherA

Finding the prime numbers between the 2 to n as given input(n) value. We know the usual solution for finding an number is prime or not in… Continue reading on M

The Quest Begins (The "Why") Honestly, I used to dread interview questions that started...

5 ways to tackle the Palindrome Number Problem Continue reading on Medium »

Ever clicked the paint bucket in MS Paint and watched a color spread across connected pixels? That’s flood fill. Let’s build it from… Continue reading on Medium

Minecraft terrain, roguelike dungeons, and No Man's Sky planets all come from the same place: rules,...

The Quest Begins (The "Why") I still remember the first time I faced a sorted array in an...

Hey everyone, I'm heading into my third year of computer engineering, and I'll be honest DSA has been the hardest part of my degree so far. I can follow along i

Problem Statement Given the root of a binary tree, return its preorder traversal. The...

Chapter 2 — Basic Data Structures Continue reading on Medium »

I fell down this rabbit hole because of a small, annoying moment in a survival game. I had a diamond...

Searching for a pattern inside a string is one of the oldest and most common problems in Computer...

I avoided backtracking for an embarrassingly long time. I had solved maybe 200 problems and could do...

I used to solve every “subarray of size k” question with two nested loops. It worked. It also would have gotten me rejected in any real… Continue reading on ILL

Part 3 of the “Algorithms You Actually Use” series. A whole class of “check every pair / every subarray” problems looks like it needs… Continue reading on Mediu

Learn the intuition behind Prefix Sum, recognize it in interviews, and solve most subarray sum problems with confidence. Continue reading on Medium »

I recently came across the classic CPU Task Scheduler problem on HackerRank. You are given an...

Part 1 of the “Algorithms You Actually Use” series. If you learn exactly one data structure deeply, make it this one. It turns slow code… Continue reading on Me

If you have ever come across this question and wanted to solve it, then this article will help you grasp a few concepts that can enable… Continue reading on Med

If you’ve solved a few LeetCode problems, chances are you’ve already used the Two Pointers pattern — even if you didn’t know its name. Continue reading on Mediu

I recently solved Find Smallest Letter Greater Than Target, and this problem reminded me that sometimes one line in the problem statement… Continue reading on M

I want to learn backtracking in Python, but I'm finding it really hard to understand the thought process behind it. I tried watching Aditya Verma's backtracking

I've been thinking about this for a while. AI can now write functions, explain code, refactor projects, generate tests, and even solve many programming problems

The Quest Begins (The "Why") I still remember the first time I faced a coding interview...

https://www.omegasyntax.com/domino/ Series of articles about Domino Tiling problem. submitted by /u/eugene [link] [comments]

The approach that cuts your time complexity in half — and most developers have never heard of it. Continue reading on Medium »

The approach that cuts your time complexity in half — and most developers have never heard of it. Continue reading on Stackademic »

Di artikel sebelumnya kita sudah memahami apa itu algoritma dan bagaimana cara menyusunnya. Kali ini kita akan membahas cara menuliskan… Continue reading on Med

How it actually works!

What each data structure in a coding interview screens for, the on-the-job behavior it predicts, and the signal your first sentences send.

Halo para developer kece! 👋 Pernah nggak sih lo ngerasa aplikasi yang udah susah payah lo bikin kok...

Not a Medium member? Use the free link below. Continue reading on Medium »

Why DSA feels impossible, why most beginners practice it wrongly, and how to build interview-ready problem-solving skills without blindly… Continue reading on D

Hi everyone, I am Nitin Gavhane and in this blog I want to tell you about the evening a McDonald’s drive-through turned into an accidental… Continue reading on