Contribution #1355

Problem: ru/6.6.21

Uploaded 6.6.21

Editor: Aliaksandr Melnichenka ( @astrosander )

Time: April 7, 2024 at 09:20 PM

GitHub commit: 13734d55461b1a04b4bb50072d5a71fb8b40bf54

+289 -59 lines changed