void printPreOrder(BstNode* root)
{
    if(root==NULL)
    {
        return;
    }
 
    printf("%d ", root->data);
 
    printPreOrder(root->left);
 
    printPreOrder(root->right);
}
 
void printInOrder(BstNode* root)
{
    if(root==NULL)
    {
        return;
    }
 
    printInOrder(root->left);
 
    printf("%d ", root->data);
 
    printInOrder(root->right);
}
 
void printPostOrder(BstNode* root)
{
    if(root==NULL)
    {
        return;
    }
 
    printPostOrder(root->left);
 
    printPostOrder(root->right);
 
    printf("%d ", root->data);
}