Added solution for Project Euler problem 135

[mtbun]

Same differences

Given the positive integers, x, y, and z, are consecutive terms of an arithmetic progression, the least value of the positive integer, n, for which the equation, x2 − y2 − z2 = n, has exactly two solutions is n = 27:
342 − 272 − 202 = 122 − 92 − 62 = 27
It turns out that n = 1155 is the least value which has exactly ten solutions.

How many values of n less than one million have exactly ten distinct solutions?

Reference: #2695
Reference: https://projecteuler.net/problem=135

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

Checklist:

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[mtbun]

Hey, how can i fix that problem?

[dhruvmanila]

Run:

$ python -m pip install pre-commit
$ pre-commit run -a

[mtbun]

i fixed pre-commit. may you look my pull request?

[dhruvmanila]

There's already an open PR for this solution so this might not get accepted. If possible please try solving other problems and opening a pull request for it. Thank you for your cooperation.

[stale]

This pull request has been automatically marked as stale because it has not had recent activity. It will be closed if no further activity occurs. Thank you for your contributions.

[stale]

Please reopen this pull request once you commit the changes requested or make improvements on the code. If this is not the case and you need some help, feel free to seek help from our Gitter or ping one of the reviewers. Thank you for your contributions!