<ul><li>Given the root of a binary tree, return an array of the largest value in each row of the tree.</li><li>The solution involves traversing all levels of the binary tree to identify the largest value at each level.</li><li>The most straightforward approach to finding the largest value in each row is using BFS or DFS.</li><li>Implementing this solution in PHP involves using a queue for BFS traversal and maintaining an array of the largest values for each row.</li></ul>

515. Find Largest Value in Each Tree Row

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