Find the sum of longest path from root to leaf node
"Find the sum of longest path from root to leaf node" means to calculate the sum of all the node values along the path from the root of a tree to the farthest leaf node.
In a tree, the "root" refers to the topmost node, while a "leaf node" refers to a node that has no children. The "longest path" from root to leaf node is the path that covers the maximum number of nodes between the root and the farthest leaf node.
To find the sum of the longest path from root to leaf node, you would need to traverse the tree and keep track of the longest path found so far. Once you reach the farthest leaf node, you would add up the values of all the nodes along that path to get the sum of the longest path.
Given a binary tree, Our goal is to get the sum of longest path in this tree.
Example /* Binary Tree  1 / \ 2 5 / \ / \ 1 7 7 2 / \ \ 9 1 3 / 7 */ /* First Path  1 / 2 / 1 Length : 3 Sum : 4 */ /* Second Path  1 / 2 \ 7 / 9 Length : 4 Sum : 19 */ /* Third Path  1 \ 5 / 7 \ 1 / 7 Length : 5 Sum : 7 */ /* Fourth Path  1 \ 5 \ 2 \ 3 Length : 4 Sum : 5 */ Output : 7 [Because path 3 are length is higher to other]
If in case more than one path contains same resultant length then in this situation we accept sum of first (first path). Here given code implementation process.

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