I have limited time and need to careful about how I spend it. If I need to prepare for an interview, I'll solve interview problems. I don't need to be able to c

I have limited time and need to careful about how I spend it. If I need to prepare for an interview, I'll solve interview problems. I don't need to be able to come up with original solutions which took exceptionally smart people a long time to develop. Frankly, I think you've given horrendous advice. Not just bad, but completely counterproductive.