Q1: Buildings with ocean view https://leetcode.com/problems/buildings-with-an-ocean-view/\nAnswered using stack in O(N) and asked not to implement it.\n\nQ2: Sum root to leaf numbers https://leetcode.com/problems/sum-root-to-leaf-numbers/\nImplemented the solution using dfs in O(N).\n\nAnd couple of follow up questions were asked for both the questions in terms of complexity and space. Interviewer seems to be convinced with my answers. Still surprising why I got rejected the next day.

Q1: Buildings with ocean view https://leetcode.com/problems/buildings-with-an-ocean-view/\nAnswered using stack in O(N) and asked not to implement it.\n\nQ2: Su