While I admire your ethics, I feel like a lot of technical job interviews are structured such that you're supposed to actively collaborate with the interviewer. The interviewer is allowed to give you hints or suggestions, and they're very interested in how well the candidate takes hints.

And sometimes the hint can be a trick! I recently did an interview where the interviewer asked if I should use a shortcut to compare two strings, one that assumed there's only one way to normalize a string. I almost fell for it, but then I hesitated and mentioned that I was concerned about some languages where that assumption wouldn't hold. They agreed and were happy that I chose the safer approach.