Elemental Algorithms: Collaz Conjecture (c++)

[lucasalustiano]

Submission Checklist

• [X] Your pull request targets the master branch of the repository.
• [X] You have only one commit (if not, squash them into one commit).
• [X] You have read the Contributing guidelines and your changes follow them.

Type of Change

• [ ] Bug fix
• [X] New implementation

PR Description

A program that compute and prints a sequence of numbers described by the Collatz conjecture, proposed by the mathematician Lothar Collatz.

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