Data Structure used

#1

I used HashSet to implement the solution .

Is there any advantage to use hashMap over HashSet or vice versa?

#2

Hey @vishakha_narang
Both have their unique functionalities.
You need sets when basically you just want to store single property of your data . Maps are just an extension of sets where you can add various other properties as well along with your key data. Maps are generally used in place of unordered_maps(HASH_TABLES) to improve the cases where collision might occur in hashtables.
For More info read this :
https://www.geeksforgeeks.org/set-vs-map-c-stl/#:~:text=Differences%3A,value%20needed%20for%20a%20key.

#3

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