Given a binary tree, the task is to find the sum of all the nodes whose parent is even.
Input: 1 / \ 3 8 / \ 5 6 / 1 Output: 11 The only even nodes are 8 and 6 and the sum of their children is 5 + 6 = 11. Input: 2 / \ 3 8 / / \ 2 5 6 / \ 1 3 Output: 25 3 + 8 + 5 + 6 + 3 = 25
Approach: Initialse sum = 0 and perform a recursive traversal of the tree and check if the node is even or not, if the node is even then add the values of its children to the sum. Finally, print the sum.
Below is the implementation of the above approach:
Time Complexity: O(n) where n is number of nodes in the given Binary Tree.
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