Disclaimer: Here is the practice link to help you assess your knowledge better. It's highly recommend trying to solve it before looking at the solution.

Brute Force Approach

Algorithm

Start iterating the array to pick an element.
Use another nested loop to check if picked elements repeat in the array.
If the inside nested loop reaches the end of the array for a picked element, it indicates it is a non-repeating element and we print it.
If not, we move to pick another element.

Code

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