Update README.md

Author: JawadSher

20 - Hashmap Data Structure Problems/README.md

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 <h1 align='center'>HASHMAP - DATA STRUCTURE - PROBLEMS</h1>
 
-This repository contains solutions to various problems based on the Hashmap data structure, sourced from LeetCode and GeeksforGeeks (GFG). The problems are organized to help you understand and practice Hashmap-related concepts, which are fundamental for many coding interviews and competitive programming challenges.
+Welcome to the Hashmap Data Structure Problems repository. This repository is dedicated to providing solutions to a variety of problems centered around the Hashmap data structure, sourced from renowned platforms like LeetCode and GeeksforGeeks (GFG). The problems are meticulously organized to aid in the understanding and practice of Hashmap-related concepts, which are pivotal for coding interviews and competitive programming challenges.
 
-The problems cover a range of difficulty levels and can be used to deepen your understanding of how Hashmaps work, including concepts like counting frequencies, managing keys and values, and implementing more complex algorithms.
+Hashmaps are a fundamental data structure used extensively in computer science for efficient data retrieval and storage. This repository aims to cover a wide range of difficulties, from basic to advanced levels, ensuring a comprehensive grasp of how Hashmaps function. Key concepts such as frequency counting, key-value management, and the implementation of complex algorithms are explored through these problems.
 
 ## Repository Content