Arrays are where we start as devs. But what if I told you arrays secretly stack superpowers?Let's go beginner → expert: mastering arrays, stacks, monotonic stac

You are given an integer array nums of size n containing each element from 0 to n - 1 (inclusive). Each of the

🧠 Why Learn This?Matrix rotation isn't just a coding interview favorite It's used in AI, ML, and image processing to manipulate data efficiently.Think:Rotating

You are given an integer array nums. The range of a subarray of nums is the difference between the largest and smallest element in the

🔁 Problem Restatement (in simpler terms)You are given:A directed graph with n nodes.Each node i has a color, colors[i] ∈ {a-z}.Each path from one node to anoth

1️⃣ Understanding the ProblemThe Decode String problem asks us to decode a string like 3[a2[c]] into accaccaccFormat: k[encoded_st

The Problem:Given an integer array nums, you need to find one continuous subarray such that if you only sort this subarray in non-decreasing orde

🐇 What is RabbitMQ?In real world systems, services fail, crash, restart, or scale dynamically. You can't afford tight coupling between them. RabbitMQ ensures n

🌍 The Why?Event Timeline Visibility:Think of mountains as tasks, events, or ads that want to be seen. Only those not completely covered by others are visible.U

Chapter 1: The Mysterious SlowdownAlex, a junior engineer at a fast-paced AI startup, was proud of their latest code. It processed massive datasets for a new re

Once upon a time, in a village of coders, there lived a gardener named Prashant. He had two ways of planting flowers in his garden Greedy and Non

🧠 Why Are You Learning This?The minimum-weight arborescence (MWA) problem is a fundamental problem in graph theory with applications in:Network desig

Let me walk you through the different variations of the LCA problem and how to solve each one with slight modifications to the core algorithm.1. Basic LCA Probl

Greedy algorithms:The class of algorithms that make locally optimal choices at each step with the hope that these choices will lead to a globally optimal soluti

1. What Are We Talking About?The 132 pattern is a problem where we need to find a subsequence of three numbers in an array (nums[i], nums[j],&nbs

Situation:You are given a sorted array of integers where every element appears exactly twice, except for one element that appears only once.

In the world of computer science and mathematics, some problems are deceptively simple to describe but incredibly challenging to solve.One such problem is the&n

Greedy algorithm only applies to the optimization problem.Greedy algorithm makes the decision at every point choosing the local minimum or maximum depending on

Imagine this: You’re in a coding interview at your dream company. The interviewer slides you a problem about scheduling meetings or merging overlapping interval

If you stack several restricted Boltzmann machine on the top of each other then we form a deep belief networkInput layers -> suplied to 1st RBM -> inputs

In this thread we will see how a single dynamic programming (DP) approach can be adapted to solve multiple seemingly different problems. By understand

A Singleton is a design pattern that ensures a class has only one instance (object) throughout the entire application and provides a global point to access it.L

Bayes' Rule:A fundamental concept in probability theory. It allows us to update our belief about an event based on new evidence.probability of an event A, given