https://note.com/makskiaa/n/ncb416d7006ec
https://note.com/makskiaa/n/n17f183dfdd08
https://note.com/makskiaa/n/n684e613723ca
https://note.com/makskiaa/n/n1f2170abfeba
https://note.com/makskiaa/n/nf29e7fae045c
https://note.com/makskiaa/n/nc349130ec9f0
https://ide.geeksforgeeks.org/d4b0c995-bea1-4fce-a746-94ecee40fc40
https://paiza.io/projects/8uQvbnOf-B5CimJnAORD_Q?language=bash
https://coliru.stacked-crooked.com/a/5cabc6ff8f2d157c
https://paste2.org/DdzHaK4Z
https://pastebin.com/ZMQf2cpA