I have an Array {1,2,3,4,4,5,3} . I want to know how many duplicate values are t

I have an Array {1,2,3,4,4,5,3} . I want to know how many duplicate values are there in that Array and the output should return the unique duplicate values like {3,4}. Is there a function to gets this output?

OriginalPostID-144331

OriginalPostID-144331

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