Linked lists are one of the most fundamental data structures in computer science and form the backbone of many real-world systems. The Delete the Middle Node of a Linked List problem (LeetCode75) is an excellent exercise to practice two-pointer techniques, linked list traversal and node manipulation. It is not only common in coding interviews but … Read more
The Dota2 Senate problem (LeetCode75) is an interesting simulation-based challenge that requires careful handling of queues and strategic thinking. It’s a popular problem because it combines string processing, greedy decisions and queue-based simulation into a single coding exercise. In this blog, we’ll break down the problem statement, provide examples, walk through the complete Python solution … Read more
The Number of Recent Calls problem is a great example of how queue-based data structures can efficiently handle time-based requests. The problem might seem simple at first but it tests your ability to design an algorithm that manages sliding windows of data within strict time constraints. This type of problem frequently appears in coding interviews … Read more
Decoding strings with nested patterns is a common problem in coding interviews, competitive programming, and real-world applications. The Decode String problem on LeetCode challenges you to expand strings encoded in the format k[encoded_string] including nested and multi-digit repetitions. Mastering this problem sharpens your skills in stack operations, string manipulation and algorithmic thinking, making it a … Read more
The Asteroid Collision problem from LeetCode75 is a classic stack-based challenge that tests your ability to simulate collisions and apply logical reasoning step by step. It is a common coding interview problem because it combines array traversal, condition handling and stack operations into one neat exercise. In this blog, we’ll break down the problem statement, … Read more
The Removing Stars From a String problem from LeetCode75 is a common interview-style string manipulation challenge that tests both logical reasoning and efficient use of data structures. At its core, the problem teaches you how to simulate backspace operations efficiently using a stack, making it an excellent exercise for understanding how Last-In-First-Out (LIFO) structures work … Read more
The Equal Row and Column Pairs problem from LeetCode75 is a matrix-based coding challenge that tests your ability to work with 2D arrays, hashing, and tuple comparisons. This problem is widely asked in interviews to evaluate how well you understand matrix traversal and efficient lookups. In this blog, we’ll break down the problem, walk through … Read more
The Determine if Two Strings Are Close problem from LeetCode 75 is a popular string manipulation challenge that tests your ability to work with sets, character frequency counts and transformation logic. This problem often appears in coding interviews because it requires careful reasoning about when two strings can be considered “equivalent” under specific rules. In … Read more
The Unique Number of Occurrences problem from LeetCode75 is a beginner-friendly coding interview question that tests your understanding of hash maps, frequency counting, and set operations. It’s often asked in interviews to check whether you can handle frequency analysis and uniqueness logic. In this blog, we’ll break down the problem, walk through examples and explain … Read more
The Find the Difference of Two Arrays problem from LeetCode (Problem 2215) is a beginner-friendly coding interview question that tests your understanding of sets, arrays and membership checks. It’s a common warm-up problem to evaluate how you handle uniqueness and comparison logic. In this blog, we’ll break down the problem, walk through examples, and explain … Read more
The Find Pivot Index problem from LeetCode 75 is a classic coding interview question that tests your understanding of prefix sums and array balancing. This problem is often used to evaluate how well candidates can manage cumulative sums and optimize linear scans. In this blog, we’ll explore the problem statement, go through examples, and implement … Read more