How to merge two 2-3 trees?

Question

C++ / C#

The situation is as follows: do you need an algorithm for combining two 2-3 trees if their key ranges intersect and is it possible to insert one tree into another at more than one node?

Answer 1

MergeSort comes to mind, in which two ordered "semi-arrays" are merged into one in linear time. You can try the same trick by traversing an ordered tree, then the insertion will still be one element at a time, but not from the root, but from the leaf nodes.