I am not able to do this question. I know that this question is to be done using hashmaps by storing the frequencies of each element in the array. After this I am not able to do it.
I even referred to Geeks for Geeks but I am not able to understand there. Please help !!
@avijuneja2007, i will suggest you to try this question using bruteforce first , and then try to optimize your solution using hashmap , i will suggest you to not directly jump to the most optimized method but instead start from bruteforce and then keep optimizing your solution as much as u can. the thing is i can explain you the solution directly and it might not make sense to you right now , instead first solve yourself and then ask me doubt in any specific part you are having problem so you will understand why this is done
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