Thought I\'d done quite well on both questions but ended up with a stock rejection email. Interviewer seemed happy with solutions so not sure what went on\n\n1. OOP design of a jigsaw puzzle. Imagine you want to solve a rectangular jigsaw puzzle. What classes and relationships do you need? Design an algo for solving the actual puzzle\n2. Validate a BST\n\n

Thought I\'d done quite well on both questions but ended up with a stock rejection email. Interviewer seemed happy with solutions so not sure what went on\n\n1.