LeetCode
Question
·
Aug 2020
·
Los Angeles
Amazon | Phone | Two Sum - Input is a BST - HELP PLEASE
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2 replies
Question Details
Problem is this: Initial solutions using map or a set were easy to come up with but interviewer wanted O(1) space complexity where the space for the recursion stack is not...
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Arrays
Binary Tree
Recursion
Stack
Two Pointers
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