Meta Software Engineer interview questions

Consists of 3 rounds, 2 technical interviews, 1 behavior interview. Technical interview only includes 2 leetcode questions each. Behavior interview dived deep into my resume. Got an code-reviewing question in one of the technical interviews.

Phone Screen (2 leetcode questions) 1. Valid Word abbreviation 2. Median of data stream Interviewer seemed uninterested during the whole interview start to finish. (I asked clarifying questions, talked through my code, dry runs ect. No comments / low energy throughout on interviewer side) Aced first question, not many follow-ups or comments from interviewer. Second question (LC Hard) did not finish full class Provided/explained optimal solution (two heaps), however I could not figure out logic to balance heaps during insertion. I asked the interviewer if I could provide a suboptimal solution with one list and sorting (return midpoint) but was told to continue with heap solution.