Artemis: Efficiency and Code Simplification Improvements

[artemis-gen-ai]

Removed unnecessary string creation and for loop, improved efficiency by directly returning reversed string. Changed function signature to single line, variable type from int to double, vector initialization to use constructor, and loop counter variable type to size_t for safety. Replaced for loops with more efficient methods to preallocate memory and append elements, and replaced nested for loops with std::sort function for sorting. Also included class name in function signature and stored vector size in a variable before loop.