Autodesk Developer interview questions

Confusing and mixed interview process. What was supposed to be 90 mins, took almost 3 hours, and interviewed with a team in a different country than the one the actual job is based out of. Why didn't anyone from the actual team meet with me? After some discussion, I was asked to implement from scratch a node finding algorithm, then got asked the monty hall problem, and lastly yet another brain teaser of sorts about poison bottles and rats. One of the two interviewers looked completely bored and disinterested the entire time. Frankly the whole process was a big red flag.