Update README - Topic Tags

Author: hogan-tech

README.md

@@ -115,3 +115,35 @@ It helps others discover the repo and keeps the project growing.
 ---
 
 Feedback / Questions → open an Issue or reach out on [LinkedIn](https://www.linkedin.com/in/hogan-l/)  
+
+<!---LeetCode Topics Start-->
+# LeetCode Topics
+## Array
+|  |
+| ------- |
+| [0315-count-of-smaller-numbers-after-self](https://github.com/hogan-tech/leetcode-solution/tree/master/0315-count-of-smaller-numbers-after-self) |
+## Binary Search
+|  |
+| ------- |
+| [0315-count-of-smaller-numbers-after-self](https://github.com/hogan-tech/leetcode-solution/tree/master/0315-count-of-smaller-numbers-after-self) |
+## Divide and Conquer
+|  |
+| ------- |
+| [0315-count-of-smaller-numbers-after-self](https://github.com/hogan-tech/leetcode-solution/tree/master/0315-count-of-smaller-numbers-after-self) |
+## Binary Indexed Tree
+|  |
+| ------- |
+| [0315-count-of-smaller-numbers-after-self](https://github.com/hogan-tech/leetcode-solution/tree/master/0315-count-of-smaller-numbers-after-self) |
+## Segment Tree
+|  |
+| ------- |
+| [0315-count-of-smaller-numbers-after-self](https://github.com/hogan-tech/leetcode-solution/tree/master/0315-count-of-smaller-numbers-after-self) |
+## Merge Sort
+|  |
+| ------- |
+| [0315-count-of-smaller-numbers-after-self](https://github.com/hogan-tech/leetcode-solution/tree/master/0315-count-of-smaller-numbers-after-self) |
+## Ordered Set
+|  |
+| ------- |
+| [0315-count-of-smaller-numbers-after-self](https://github.com/hogan-tech/leetcode-solution/tree/master/0315-count-of-smaller-numbers-after-self) |
+<!---LeetCode Topics End-->