lca lowest common ancestor

gistfile1.txt

struct node *lca(struct node* root, int n1, int n2)
{
    if (root == NULL) return NULL;
 
    // If both n1 and n2 are smaller than root, then LCA lies in left
    if (root->data > n1 && root->data > n2)
        return lca(root->left, n1, n2);
 
    // If both n1 and n2 are greater than root, then LCA lies in right
    if (root->data < n1 && root->data < n2)
        return lca(root->right, n1, n2);
 
    return root;
}