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Most people memorize the Prefix Sum + Hash Map solution for Subarray Sum Equals K — but don't truly understand why it works.

Day 6 of my 1000 LeetCode Problems Challenge Solved LeetCode 409 – Longest Palindrome using a clean frequency ...

In this video, we deep dive into ConcurrentHashMap in Java and understand how it achieves high performance and thread safety ...

Today I solved LeetCode 884 Uncommon Words from Two Sentences using Python In this video, I explain the solution step by ...

Arrays and HashMaps are some of the most important topics in coding interviews — and once you understand them, many ...

In this video, I solve LeetCode Problem 1 – Two Sum with a clear and beginner-friendly explanation. You'll learn: • Problem ...

Learn how to solve the Clone Graph problem (LeetCode 133) using both DFS and BFS approaches! 🕸️ In this video, we break ...

Learn the fundamentals of the Trie Data Structure (Prefix Tree) in this beginner-friendly guide! We break down how Tries work, ...

TwoSumProblem #DSA #CodingInterview Leetcode #2 | Two Sum Problem Explained in Java | Brute Force vs O(n) Hash Map ...

Here's my solution to the LeetCode Problem 1679: Max Number of K-Sum Pairs, implemented in C# using an Efficient HashMap ...

... pub, use) ⏱️ Chapters: 0:00 - Introduction 0:15 - HashMap Explained 0:33 - Create Rust Project 1:00 - Create Sample Text ...

n this video, we will deeply understand the Java Collection Framework Hierarchy in a very simple and beginner-friendly way.

Learn how to solve the classic "Find the Single Number" coding interview problem efficiently using the Bitwise XOR operator!

In this video, I explained the Two Sum problem completely from scratch, using it as a transition from hashing-based approaches to ...

Learn how to solve the famous "Insert Delete GetRandom O(1)" coding interview problem with a constant time complexity solution!

Welcome to Lecture 32 of the DSA Series in Telugu! 💻🔥 In this video, we’ll solve the famous LeetCode Problem – “Longest ...

Checkout GeeksforGeeks Three 90 Challenge:- https://gfgcdn.com/tu/WO4/ Fastest Way to Learn DSA in Java | Full Roadmap ...

Learn how to solve the Random Pick Index problem efficiently using Reservoir Sampling! In this video, we tackle a common ...

hashmap #javatutorials #marathi Internal Working of HASHMAP | Java Most Asked Interview Question | aadiandjava Java ...

Learn how to design and implement a Least Frequently Used (LFU) Cache with O(1) time complexity! In this video, we break ...