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Phone Screen: Two classic leetcode problems in the Top 30 list. One tests binary search in a sorted array, another one tests graph search using Breath First Search or Depth First Search algorithm
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- The "Alien Dictionary" problem is a classic LeetCode question (specifically LeetCode Problem 269) that requires determining the alphabetical order of characters in a new language given a list of words sorted according to that language's rules. This is typically solved using graph theory and topological sorting (Kahn's algorithm or DFS).
Coding
- Convert Binary Search Tree to Sorted Doubly Linked List
Coding
- Convert Sorted Array to Binary Search Tree
Coding
- Convert Sorted List to Binary Search Tree
Coding
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Phone Screen: Two classic leetcode problems in the Top 30 list. One tests binary search in a sorted array, another one tests graph search using Breath First Search or Depth First Search algorithm
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Source snapshot: Nov 12, 2026
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