Spiral matrix -> Mock interview 10 times

 First time I had a mock interview on another mock interview platform on Jan. 23, 2018, and it is anonymous one.

The interviewer asked me if I can write the solution only using one loop instead of four for loops inside one while loop whereas two for loops to iterate on row, either top or bottom row; two for loops to iterate on last column or first column.

I had worked on the algorithm over 10 times on mock interview, but I never come out the completed idea based on limited time concern and buggy for loops. None of my peers came out the idea and wrote the similar ideas, and I only had discussion with one peer before. As an interviewer or interviewee, I did thought about four for loops are problematic as well.

Here is the link of 10 rounds of mock interviews.