Contribution #2510

Problem: en/10.2.12

Added Luis's English solution of problems 10.2.11 and 10.2.12

Editor: Luis Daniel Fernández Quintana ( @Luisito )

Time: August 30, 2024 at 03:29 PM

GitHub commit: ab486fb599223f36f19111b1d170f31b8922512d

+87 -7 lines changed