Contribution #1489

Problem: ru/1.3.1

Added 1.4.5&1.4.7+Some statements; Updated 1.4.6

Editor: Aliaksandr Melnichenka ( @astrosander )

Time: June 22, 2024 at 05:45 PM

GitHub commit: 37141fc82513aa6fb55fb9cb53c09ed7ba9cba86

+50 -44 lines changed