Create 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.
+
+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.
+
+## Repository Content
+
+<p>
+<img src="https://img.shields.io/badge/problems%20count-02-orange?logo=leetcode" alt="LeetCode">
+<img src="https://img.shields.io/badge/problems%20count-00-darkgreen?logo=geeksforGeeks" alt="GeeksforGeeks">
+<img src="https://img.shields.io/badge/total%20problems%20count-03-blue" alt="Problem Count"> 
+</p>
+
+| No | Problem Name | Description | LeetCode | GFG |
+|----|--------------|-------------|----------|---------------|
+| 01 | [Example](https://github.com/JawadSher/DSA-LeetCode-GFG-Problems-Repository/tree/main/20%20-%20Hashmap%20Data%20Structure%20Problems/01%20-%20Example) | This is a basic example problem demonstrating the use of Hashmaps for simple operations. | Non | Non |
+| 02 | [Count Elements With Maximum Frequency](https://github.com/JawadSher/DSA-LeetCode-GFG-Problems-Repository/tree/main/20%20-%20Hashmap%20Data%20Structure%20Problems/02%20-%20Count%20Elements%20With%20Maximum%20Frequency) | Find the element with the highest frequency in a Hashmap. | [Link](https://leetcode.com/problems/count-elements-with-maximum-frequency/) | Non |
+| 03 | [N - Queens](https://github.com/JawadSher/DSA-LeetCode-GFG-Problems-Repository/tree/main/20%20-%20Hashmap%20Data%20Structure%20Problems/03%20-%20N%20-%20Queens) | A famous problem solved using Hashmap for tracking safe positions of queens on a chessboard. | [Link](https://leetcode.com/problems/n-queens/) | Non |