Contribution #394

Problem: ru/5.6.30

Added 4.6.16 4.6.17 5.6.30

Editor: Aliaksandr Melnichenka ( @astrosander )

Time: November 3, 2023 at 10:52 PM

GitHub commit: a925722d04fdb1916cac822840991c619476e39a

+244 -50 lines changed