Contribution #461

Problem: ru/11.1.13

Added 11.1.2-11.1.3 11.1.13-11.1.17 11.1.19 11.1.21 11.1.24-11.1.25

Editor: Aliaksandr Melnichenka ( @astrosander )

Time: November 6, 2023 at 06:21 PM

GitHub commit: 389cf7f927d954d50fc0dfb252ec19af1150fdc5

+238 -49 lines changed