Contribution #330

Problem: ru/1.3.10

Added 1.2.21 1.3.10 1.3.11

Editor: Aliaksandr Melnichenka ( @astrosander )

Time: October 24, 2023 at 08:21 AM

GitHub commit: a2c4afd2b2539aa2a1cb9610655f9e5a9f7fd97a

+252 -48 lines changed