Most of my code is thrown away. But I like to finish stuff, so there is a chance I spend next weekend finishing/polishing the interview questions. It is great f

Most of my code is thrown away. But I like to finish stuff, so there is a chance I spend next weekend finishing/polishing the interview questions. It is great for career, but has to be managed. Also my job is to design database structures, and there is no such thing as simple problem. Even binary tree needs thousands LOC for tests, concurrent access, writes...