Interview Strats Position ( REALLY STRANGE)

Hi everyone, I did an Interview for strats analyst position.

The interview happened in a web-platform where you need to write algorithms about some problem and the interviewer can see everything that you are coding.

He said that will be 3 problems and I choose Python to code. The first problem was really simple and I did fast.

The second problem was more tricky but not too hard, I did too and my answers were correct but the interviewer started to ask me if I could code the problem in another way decreasing the time complexity of the code.

I started the problem again using dictionaries (table hash for those who are not familiar with python) but it was a bit harder and I started pause to thinking and the interviewer started to help me with the problem. It was a little strange because the interviewer was helping me a lot to write the code with the another data structure and when the time was up, I didnt get chance to see the 3rd problem and I just solved two problems being the second solved in my way and his way. Really strange interview 

 I dont know If I passed in this round because I have solved 2 of 3 problems but one of them the interviewer helped me a lot or I did really bad.

I really dont know what happened. Someone has experienced something like that before ???