You're right about that too :) But I need help. I am new here. I don't know how to do it. I liked this place very much, I solved many questions, and I learned a lot. I wanted to make a small contribution. :)

Yes you are right but I wanted to complicate the problem even more.
For example input:[...3,4,3...].
Output: Expected to be [..3..].
The number 3 should not be printed twice. So I thought that those who solved the question would also use set logic.

I was enlightened when I saw this solution. thanks bro :)

You're right. I am sorry. not again.

I couldn't figure it out without using a nested loop.

I had a hard time solving it, but I finally solved it. I felt stupid when I saw the best solution in the answers section. indeed, it has a simple solution, but I used too many unnecessary things.

I pass the test but I cannot pass the attempt. :(