Unique elements

Question

How to find unique elements of the massif, using set/map?
Input: 7(number of the elements)
3 5 -7 7 5 -9 -4
Output: 3 -7 7 -9 -4

Answer 1

You can do that :
https://code.sololearn.com/c5E5Gyst8QEW/?ref=app