Yup, exactly! The interviewer gets annoyed, since it's "so obvious" how to solve the problem... much like anything becomes obvious if you've done it a few dozen

Yup, exactly! The interviewer gets annoyed, since it's "so obvious" how to solve the problem... much like anything becomes obvious if you've done it a few dozen times. Or they tune out. Or they dismiss any variation as "wrong" rather than giving it a chance.