olemus
suurim kaarte arv puu juure ja lehe vahel
=
the number of edges on the longest downward path between the root and a leaf

ülevaateid
https://medium.com/@mdkulkarni76/height-and-depth-of-a-binary-tree-2a9f115eeee9

http://typeocaml.com/2014/11/26/height-depth-and-level-of-a-tree/

https://stackoverflow.com/questions/2603692/what-is-the-difference-between-tree-depth-and-height

https://www.gatevidyalay.com/tree-data-structure-tree-terminology/