Contribution #8770

Problem: ru/3.1.7

Updated 3.1.5-3.1.9 solutions

Editor: Aliaksandr Melnichenka ( @astrosander )

Time: September 23, 2024 at 02:52 AM

GitHub commit: 7ac0d60fd37c71f76224d1c33c3233e92f788e61

+105 -110 lines changed