Red-Black Tree
from
B-tree
https://speakerdeck.com/kyuden/red-black-tree-for-ruby
https://keens.github.io/blog/2019/11/02/daisuutekide_takatatopata_nmatchinohoi__akakuroki/
Misreading Chat
28
http://wwwa.pikara.ne.jp/okojisan/rb-tree/index.html
http://jats-ug.metasepi.org/doc/ATS2/INT2PROGINATS/x2807.html
https://justinpombrio.net/2021/03/11/algebra-and-data-types.html
2-3-4木
に等しい