solution: Project Euler Problem 19

[MatheusMuriel]

 know more

Describe your change:

• [x] Add an algorithm?
• [ ] Fix a bug or typo in an existing algorithm?
• [ ] Documentation change?

Checklist:

• [x] I have read CONTRIBUTING.md.
• [x] This pull request is all my own work -- I have not plagiarized.
• [x] I know that pull requests will not be merged if they fail the automated tests.
• [x] This PR only changes one algorithm file. To ease review, please open separate PRs for separate algorithms.
• [x] All new JavaScript files are placed inside an existing directory.
• [x] All filenames should use the UpperCamelCase (PascalCase) style. There should be no spaces in filenames. Example:UserProfile.js is allowed but userprofile.js,Userprofile.js,user-Profile.js,userProfile.js are not
• [x] All new algorithms have a URL in its comments that points to Wikipedia or other similar explanation.
• [x] If this pull request resolves one or more open issues then the commit message contains Fixes: #{$ISSUE_NO}.

[MatheusMuriel]

Added the comments and refactored to make more legible

[MatheusMuriel]

offtopic: @appgurueu i saw that you like Lua, a professor at my university studied in the department that developed the Lua language at PUC-Rio 😄

[appgurueu]

offtopic: @appgurueu i saw that you like Lua, a professor at my university studied in the department that developed the Lua language at PUC-Rio smile

Oh that's nice!

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