Mock:\n* https://leetcode.com/problems/search-a-2d-matrix/\n\nReal:\n* https://leetcode.com/problems/minimum-add-to-make-parentheses-valid/\n* https://leetcode.com/discuss/interview-question/354854/Facebook-or-Phone-Screen-or-Cut-Wood\n\nI ended up providing the optimized O(n) time and O(1) space solution for the parentheses problem. For the wood one, I provided a brute force solution with a lot of prompting from the interviewer - not sure this one will cut it.\n\nGood luck out there!

Mock:\n https://leetcode.com/problems/search-a-2d-matrix/\n\nReal:\n https://leetcode.com/problems/minimum-add-to-make-parentheses-valid/\n* https://leetcode.co