Trees quiz question no. 1

what is the question ,i am not able understand,also please give solution.

hello @varu
question is saying nodes of binary tree are stored in an array .
root node is stored at index 1 .
if index of a particular node is i . then its left child will be stored at index 2i of the array.
and right child will be stored at index 2
i+1.

now they are asking to u to tell the minimum size of the array.

solution->
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sir,i have asked question no.1 to find no. of waste node for tree with n nodes

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