4 technical interviews
no system design

1. how many unique values in an array
2. similar to this: https://leetcode.com/problems/search-suggestions-system/ (solved with trie, did not finish it, but interviewer was satisfied with what I did)
3. copy list with random pointer (https://leetcode.com/problems/copy-list-with-random-pointer/)
4. some problem with binary search, pretty easy but I can't remember exactly;

Good luck! :)