Contribution #724

Problem: ru/2.3.15

Added 2.3.12 2.3.13 2.3.14 2.3.15 2.3.16

Editor: Aliaksandr Melnichenka ( @astrosander )

Time: November 27, 2023 at 08:01 PM

GitHub commit: 1ccd5037106d83f8f711a6f9d402f5461c4c0ce3

+182 -0 lines changed