/*Complete the function below

struct Node

{

    int data;

    struct Node* left;

    struct Node* right;

    Node(int x){80

        data = x;

        left = right = NULL;

    }

};

*/

class Solution{

    public:

    //Function to check whether all nodes of a tree have the value 

    //equal to the sum of their child nodes.

    int ans=1;

    int solve(Node *root)

    {

        if(root==nullptr)   

            return 0;

        if(root->left==nullptr && root->right==nullptr)

            return root->data;

        int temp=(solve(root->left)+solve(root->right));

        if(root->data!=temp)

            ans=0;

        return root->data;

    }

    int isSumProperty(Node *root)

    {

     // Add your code here

        solve(root);

        return ans;

    }

};