Maximum parent children sum in Binary tree in C++

In this tutorial, we will be discussing a program to find maximum parent children sum in Binary tree

For this we will be provided with a binary tree. Our task is to add up the parent node with its children nodes and finally find the maximum of all of that and print it out.

Example

 Live Demo

#include <iostream>
using namespace std;
struct Node {
   int data;
   struct Node *left, *right;
};
//inserting nodes
struct Node* newNode(int n) {
   struct Node* root = new Node();
   root->data = n;
   root->left = root->right = NULL;
   return root;
}
int maxSum(struct Node* root) {
   if (root == NULL)
      return 0;
   int res = maxSum(root->left);
   if (root->left != NULL && root->right != NULL) {
      int sum = root->data + root->left->data + root->right->data;
      res = max(res, sum);
   }
   return max(res, maxSum(root->right));
}
int main() {
   struct Node* root = newNode(15);
   root->left = newNode(16);
   root->left->left = newNode(8);
   root->left->left->left = newNode(55);
   root->left->right = newNode(67);
   root->left->right->left = newNode(44);
   root->right = newNode(17);
   root->right->left = newNode(7);
   root->right->left->right = newNode(11);
   root->right->right = newNode(41);
   cout << maxSum(root);
   return 0;
}

Output

91