Meta Developer interview questions

submit my resume through internal referal. Got contacted by someone a new established department in Facebook. He give me a 10 minute quick chat about this newly established department, and set up a first round interview a week after that. I did bad in that interview. Although it's a very common data structure/ algorithm problem

I have interviewed with facebook 3 times. every time they ask the same stupid question given an array of integers, find 3 integers that sum to zero. as many as 3 people from HR get involved to schedule a simple phone screen. and even after solving the problem in O(n^2) time, i did not get any on-site with them.