Contribution #435

Problem: ru/10.1.23

Added 10.1.23 11.1.18 11.1.22 11.1.26 11.1.31

Editor: Aliaksandr Melnichenka ( @astrosander )

Time: November 4, 2023 at 02:48 PM

GitHub commit: fbf8ff2de0b720336367fe00e5a0707dd8bba3ef

+248 -51 lines changed