Welcome to Episode 7 of our 50-Day Competitive Programming Challenge! In our previous episode, we tackled the legendary Two Sum problem using the “Brute Force” method with nested loops. While Brute Force is a great baseline to show an interviewer, its O(n^2) time complexity is too slow for massive datasets. Today, we are going to … Read more
Welcome to Episode 6 of our Competitive Programming for Beginners Challenge! Today, we are taking on the undisputed king of coding interviews, a true rite of passage for every programmer: LeetCode Number 1: Two Sum. When you step into a technical interview, your interviewer wants to see how your brain works. The best way to … Read more
Welcome to Episode 5 of our Competitive Programming for Beginners Challenge! After crushing our first few problems on Codeforces, we are stepping into a brand new arena today: LeetCode. We are tackling what is arguably the most famous coding interview question in the world: FizzBuzz (LeetCode 412). While it tests basic conditional logic, it contains … Read more
Welcome to Episode 4 of our Competitive Programming for Beginners Challenge! Today, we are looking at a problem that perfectly illustrates why you should always stop and think about the math before you start typing code. We are solving Domino Piling (Codeforces 50A). At first glance, this looks like a complex spatial puzzle requiring 2D … Read more
Welcome to Episode 3 of our 50-Day Competitive Programming Challenge! After tackling basic math conditions in our last problem, we are stepping into a very crucial topic for coding interviews and placement drives: String Manipulation. Today, we are solving Way Too Long Words (Codeforces 71A). Have you ever noticed how developers sometimes write “localization” as … Read more
Introduction Welcome to the very first problem of our 50-Day Competitive Programming Challenge! If you are just starting your journey into competitive programming, the Watermelon problem (Codeforces 4A) is universally considered the best place to begin. At first glance, this problem seems extremely simple, but it teaches a fundamental lesson that every programmer needs to … Read more
Introduction In this tutorial, we will learn about multidimensional arrays in C++, with a focus on 2D arrays (two-dimensional arrays). A multidimensional array is essentially an array of arrays. Among them, 2D arrays are the simplest and most commonly used. They are often used to represent data in a tabular format (rows and columns) — … Read more
Introduction to Arrays in C++ In C++ programming, an array is a collection of elements of the same data type, stored in contiguous memory locations. Each element can be accessed using an index. 👉 Example:Instead of creating 100 different variables to store the ages of 100 people, you can create a single integer array of … Read more
Introduction The do-while loop in C++ is similar to the while loop, but with one key difference:👉 The loop body executes at least once, even if the condition is false initially. That’s why it’s called an exit-controlled loop. Syntax Working of Do-While Loop Example: Menu-driven program using Do-While Key Points Differences Between While and Do-While … Read more
Introduction The while loop in C++ is used when the number of iterations is not known in advance. It keeps executing a block of code as long as the given condition is true. This makes it ideal for cases where you want to loop until a specific event occurs (like user input, reaching a target, … Read more