Contribution #430

Problem: ru/9.1.15

Added alternative solution to 9.1.15

Editor: Aliaksandr Melnichenka ( @astrosander )

Time: November 4, 2023 at 02:16 PM

GitHub commit: 7ba528bf1ec6ac366a2fdfa67abd04b1cb31eaa8

+60 -53 lines changed