Issue #11232 : Refactor show_data method to use instance attribute self.N instead of global variable N for better encapsulation and readability.

[MannCode]

Issue : #11232

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

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 functions and variable names follow Python naming conventions.
• [x] All function parameters and return values are annotated with Python type hints.
• [x] All functions have doctests that pass the automated testing. All new algorithms include at least one URL that points to Wikipedia or another similar explanation. If this pull request resolves one or more open issues then the description above includes the issue number(s) with a closing keyword: "Fixes #ISSUE-NUMBER".