I worked for a company that really focused on a specific algorithm question in the interview. The correct solution required solving a pretty complex indefinite

I worked for a company that really focused on a specific algorithm question in the interview. The correct solution required solving a pretty complex indefinite integral, which basically selected for people with a math or physics background (I was cut some slack for not solving it because I was an intern). Hence, the company was full of really smart physicists who didn't know modern software practices. Eventually they folded because even though they had really impressive demos, they couldn't scale and produce a working product.