There’s just so much guesswork with these as interview questions. The number of different problem spaces is non-trivial, and understanding the nature of the problem space for use in work is quite different from being able to work out a problem in 30 minutes in front of other people often in a code editor that is unfamiliar.

We lack an agreed upon, specific way to evaluate someone’s talent in 30-90 minutes. LC problems are not a terribly efficient way to fix this.