#include <iostream>

using namespace std;

struct Node
{
    int data;
    struct Node* left, * right;
    Node(int data)
    {
        this->data = data;
        left = right = NULL;
    }
};

int main() {
    struct Node* root = new Node(50);
    root->left = new Node(17);
    root->right = new Node(72);
    root->left->left = new Node(12);
    root->left->right = new Node(23);
    root->right->left = new Node(54);
    root->right->right = new Node(76);
    root->left->left->left = new Node(9);
    root->left->left->right = new Node(14);
    root->left->right->left = new Node(19);
    root->right->left->right = new Node(67);
    return 0;
}