Tree bottom view

#1

IN THIS PLEASE EXPLAIN THE INPUT FORMAT
OF TREEE

#2

The array given as input is basically the level order traversal of the tree. The first node is the root, the second is left child and next is right child. Similarly, you start filling the tree from the left side and continue like this till the whole level is filled. -1 denotes that the parent does not have a child. So you need to write a function to create a tree using this level order input.

#3

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