Posts by Ajay Dabade

If you've read our previous post on the basics of DSA, you already know that data structures are how we organize data so a program can use it efficiently. But before you can understand arrays, stacks,…

"Don't memorize Time Complexity—understand how the code executes." 📖 Introduction If you're learning Data Structures and Algorithms (DSA), one of the first topics you'll encounter is Time Complexity. It is one of the most important concepts…

Welcome back! In Part 1, we learned what Time Complexity is, what Big-O notation means, why constants are ignored, and how to analyze simple loops. We also saw why loops with i++, i += 2, and…

Welcome to the final part of this guide! 🎉 In Part 1, we learned the fundamentals of Time Complexity, Big-O notation, and how to analyze simple loops. In Part 2, we explored logarithmic complexity (O(log n)),…

"Don't memorize the formulas. Understand why they exist." 💡 📖 Introduction If you've started learning Data Structures and Algorithms (DSA), you've probably heard terms like: Big-O Notation Big-Omega Big-Theta Asymptotic Analysis Most students memorize these definitions…

Understanding the Mathematics Behind Big-O "The mathematical definition is not used to calculate Big-O. It is used to prove that your Big-O answer is correct." 💡 📖 Introduction Congratulations! 🎉 In Part 1, we learned: What…

Swap Two Numbers Without Using a Third Variable Trick: Use arithmetic operators. public class SwapNumbers { public static void main(String[] args) { int a = 10; int b = 20; a = a + b; b…