First non repeating character in a string that doesn’t repeat is a popular problem for pupils. It sounds easy to find the “K’th” instance of such a character, but it gets harder when you have to do it. Many learners struggle to balance memory usage and speed when working with large datasets. It’s quite important …
Finding the right “window” size is the trickiest part of working with k sorted lists. Each list needs to contribute to the range, and the difference between the smallest and largest integers should be minimal. Many technical interviews feature this question because it assesses your ability to manage multiple pointers and use tools like heaps …
Smallest Range with Elements from k Sorted Lists Read More »
Finding the longest path in a grid can be like solving a really hard problem. The snake sequence problem is a famous test of your ability to think logically and spatially for students and developers who are just starting to learn about data structures and algorithms (DSA). You have to walk across a grid and …
Many students struggle to visualise what exactly makes the worst case of merge sort happen. Unlike Quicksort, where a sorted array is a nightmare, Merge Sort finds its “worst” scenario in a very specific, staggered permutation. To understand Data Structures and Algorithms (DSA), you need to know how to make this permutation. This article will …
Find a Permutation That Causes Worst Case of Merge Sort Read More »
Choosing the right approach to solve a probability question in Data Structures and Algorithms (DSA) can be the difference between an efficient solution and a time-limit error. When we look at a matrix probability problem, we are essentially looking at a survival game. A point starts at a specific coordinate on a grid and moves …
Students usually have a hard time finding a good way to solve the traveling salesman problem. This is where the Branch and Bound approach comes in. It gives you a smart way to get rid of problematic paths early on and just look at the best ones. Also Read – Advance Data Structure and Algorithms …
Traveling Salesman Problem Using Branch And Bound Read More »
When you start your journey into software development, you quickly realise that programs aren’t just linear lists of instructions. They have to “think” and respond to diverse things. This is where the Java If Else logic is used. Imagine building a login system; you need the code to check if a password is correct before …
Hashing in Data Structure is a method that makes it possible to search for, add, and delete data in an average of O(1) time. It is what makes “Hash Maps,” “Dictionaries” in Python, and “Objects” in JavaScript work. What is Hashing in Data Structure? Using a mathematical formula called a Hash formula, hashing maps enormous …
While more complex structures like Segment Trees exist, the Fenwick Tree offers a “cleaner” solution for specific types of range queries. This article provides an in-depth look at fenwick tree implementation, a comparison of fenwick tree vs segment tree, and how to master fenwick tree python for your next fenwick tree leetcode challenge. Binary Indexed …
In the field of computer science, organization is frequently what makes things work well. The Queue Data Structure is what makes systematic processing possible. It is used by printers to handle multiple pages, web servers to handle incoming requests, and operating systems to schedule tasks. Like a queue of passengers waiting for a bus, a …
