Bloomberg Industry Group Sr. Software Engineer interview questions

2 easy to medium problems, and no follow up questions or improvements asked in the interview. But just got an automated mail as not selected without any reason or interview feedback.

Interview was one question about trees in C++ . the interviewer ask me to build new database that can have n nodes from each node . that was little hard to understand and I did that . so he asked me to solve the question with running the code in one hour ( the question built from 8 different questions). I couldn't do that in one hour to compile the code.