Собственное решение

https://defence-line.org/2023/02/sobstvennoe-reshenie-chast-1/

https://defence-line.org/2023/02/sobstvennoe-reshenie-chast-2/

https://defence-line.org/2023/02/sobstvennoe-reshenie-chast-3/

https://defence-line.org/2023/02/sobstvennoe-reshenie-chast-4/

https://defence-line.org/2023/02/sobstvennoe-reshenie-chast-5/