Arrays intersection of two arrays

#1

i m not able to think how to put same key value twice in hashmap so that out for the given test case in the question comes to be [1,1,2,2,3]

#2

Hey @vikashkmr519,
You needn’t use a hashmap for this. You can use a Hashset. Put all elements of array 1 in a hashset. And search element wise for array 2 elements in the hashset.

#3

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