Facebook | Phone | Binary Tree View

I think it's similar to,
https://leetcode.com/problems/binary-tree-right-side-view/

image

output: 5 9 3 2 6 1 7 4 8 0

It was for Machine Learning Engineer role and I failed. Would love to see the solutions.

UPDATE: it's more like https://leetcode.com/articles/vertical-order-traversal-of-a-binary-tree/

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