Introduction
I am very experienced interviewer on this algorithm called Sales path. When the peer told me that he likes to write a breadth first search, and later he gave me his analysis for optimized idea, I know that he is very talent programmer. It turns out that he is currently working for Amazon two years.
Anyway, it is a good lesson for us to learn the algorithm written in Java.
Mock interview
Here is Java code I reviewed. I did not make any comments on coding style, I did ask how to remove hashmap.
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