Medium
Quiz
#515 Find Largest Value in Each Tree Row
APPROACH
Given the root of a binary tree, return an array of the largest value in each row of the tree (0-indexed).
Example 1:
Input: root = [1,3,2,5,3,null,9]
Output: [1,3,9]
Example 2:
Input: root = [1,2,3]
Output: [1,3]
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What is the optimal approach for this problem?