2641. Cousins in Binary Tree II

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Given the root of a binary tree, replace the value of each node in the tree with the sum of all its cousins' values. Two nodes of a binary tree are cousins if they have the same depth with different parents. Return the root of the modified tree. Note that the depth of a node is the number of edges in the path from the root node to it. Example 1: Input: root = [5,4,9,1,10,null,7] Output: [0,

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solution.cppC++17

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