Update README.md

Author: black-shadows

README.md

@@ -23,7 +23,7 @@ I have solved quite a number of problems from several topics. See the below tabl
 | [Graphs](https://github.com/black-shadows/InterviewBit-Topicwise-Solutions/tree/master/Graphs)| 29| 
 | [Greedy](https://github.com/black-shadows/InterviewBit-Topicwise-Solutions/tree/master/Greedy)| 13| 
 | [Hashing](https://github.com/black-shadows/InterviewBit-Topicwise-Solutions/tree/master/Hashing)| 26| 
-| [Heaps And Maps](https://github.com/black-shadows/InterviewBit-Topicwise-Solutions/tree/master/Heaps%20and%20Maps)| 15| 
+| [Heaps And Maps](https://github.com/black-shadows/InterviewBit-Topicwise-Solutions/tree/master/Heaps%20and%20Maps)| 19| 
 | [Linked Lists](https://github.com/black-shadows/InterviewBit-Topicwise-Solutions/tree/master/Linked%20Lists)| 22| 
 | [Math](https://github.com/black-shadows/InterviewBit-Topicwise-Solutions/tree/master/Math)| 42| 
 | [Stacks And Queues](https://github.com/black-shadows/InterviewBit-Topicwise-Solutions/tree/master/Stacks%20and%20Queues)| 25|