Update README.md

Author: 17tanya

README.md

@@ -1,6 +1,6 @@
 # Leetcode / Data-Structures-and-Algorithms
-This repository contains solutions to coding problems based on Data Structures and Algorithms.
-## Dynamic Programming
+This repository contains solutions to coding problems based on Data Structures and Algorithms. It aims to help people understand the application of DSA concepts in questions. :rocket:
+## :pushpin: Dynamic Programming
   - [MIT 6.006 Dynamic Programming](DynamicProgramming/MIT-6.006-IntroToAlgosNotes/)
   - [Number of Ways to Change Coin(Unlimited Supply of Coins)](DynamicProgramming/CoinChangeWays/CoinChangeNumberOfWays.java)
   - [Dice Throw](DynamicProgramming/DiceThrow/DiceThrow.java)
@@ -23,7 +23,7 @@ This repository contains solutions to coding problems based on Data Structures a
   - [Word Break Problem - Return Boolean](DynamicProgramming/WordBreakProblem/WordBreakBoolean.java)
   - [Word Break Problem - Print all Possible Word Breaks - Recursion](DynamicProgramming/WordBreakProblem/WordBreakPrintWords.java)
   - [Word Break Problem - Print all Possible Word Breaks - DP](DynamicProgramming/WordBreakProblem/[Optimized]WordBreakPrintWords.java)
-## Graphs, DFS & BFS
+## :pushpin: Graphs, DFS & BFS
   - [Leetcode 547. Friend Circles](GraphsDFS&BFS/Friend_Circles.java)
   - [Leetcode 200. Number of Islands](GraphsDFS&BFS/Number_of_Islands.java)
   - [Leetcode 133. Clone Graph](GraphsDFS&BFS/Clone_Graph.java)
@@ -33,21 +33,21 @@ This repository contains solutions to coding problems based on Data Structures a
   - [Leetcode 207. Course Schedule](GraphsDFS&BFS/Course_Schedule.java)
   - [Leetcode 210. Course Schedule II](GraphsDFS&BFS/Course_Schedule_II.java)
   - [Leetcode 269. Alien Dictionary](GraphsDFS&BFS/Alien_Dictionary_Topological_Sort.java)
-## Trees
+## :pushpin: Trees
   - [Leetcode 230. Kth Smallest Element in a BST](Trees/Kth_Smallest_Element_in_a_BST.java)
   - [Leetcode 98. Validate Binary Search Tree](Trees/Validate_Binary_Search_Tree.java)
-## Stacks
+## :pushpin: Stacks
   - [Leetcode 394. Decode String](Stacks/Decode_String.java)
-## Linked Lists
+## :pushpin: Linked Lists
   - [Leetcode 19. Remove Nth Node From End of List](LinkedList/Remove_Nth_Node_From_End_of_List.java)
-## Sliding Window
+## :pushpin: Sliding Window
   - [Leetcode 438. Find All Anagrams In a String](SlidingWindow/Find_All_Anagarms_In_A_String.java)
   - [Leetcode 78. Minimum Window Substring](SlidingWindow/Minimum_Window_Substring.java)
   - [Leetcode 159. Longest Substring With At Most 2 Distict Characters](SlidingWindow/Longest_Substring_With_Atmost_Two_Distinct_Characters.java)
   - [Leetcode 3. Longest Substring Without Repeating Characters](SlidingWindow/Longest_Substring_Without_Repeating_Characters.java)
   - [Leetcode 424. Longest Repeating Character Replacement](SlidingWindow/Longest_Repeating_Character_Replacement.java)
   - [Leetcode 567. Permutation in String](SlidingWindow/Permutation_in_String.java)
-## Binary Search
+## :pushpin: Binary Search
   - [Binary Search Topcoder Notes](BinarySearch/Binary_Search_Notes.txt)
   - [Binary Search Variants](BinarySearch/Binary_Search_Variants.java)
   - [Leetcode 1351. Count Negative Numbers in a Sorted Matrix](BinarySearch/Count_Negative_Numbers_in_a_Sorted_Matrix.java)
@@ -59,7 +59,7 @@ This repository contains solutions to coding problems based on Data Structures a
   - [Leetcode 35. Search Insert Position](BinarySearch/Search_Insert_Position.java)
   - [Leetcode 33. Search in Rotated Sorted Array](BinarySearch/Search_in_Rotated_Sorted_Array.java)
   - [Leetcode 69. Sqrt(x)](BinarySearch/Sqrt(x).java)
-## Arrays
+## :pushpin: Arrays
   - [Leetcode 48. Rotate Image](Arrays/Rotate_Image.java)
   - [Leetcode 41. First Missing Positive](Arrays/First_Missing_Positive.java)