Trie tree string search and one dynamic programming
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Implement a Trie to handle words
Medium and Hard Programming Questions from LeetCode. System Design and Scalability Questions (Improving overused api's performance) Object-Oriented Design How to test elevator and url?
Given a family tree, how would you find the least common ancestor?
It is about the topological sort
What if you can only use O(1) space and no recursion for this question?
What IS Big O?
Have you used any of their products before?
A dp question.
Given a 2D array, where there are 0s and 1s (1 representing island) count how many islands are there, for example, [[0,1,1], [1,0,0], [0,1,0]] there are 3 islands there (because in the first row 2 of 1s are connected so they created a bigger island.
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