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Short and concise Scala solutions to Project Euler problems.

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Short and concise Scala solutions to Project Euler problems.

This is a repository with my Scala solutions to Project Euler problems.

I was morally divided whether to publish them or not, since I don't want to spoil the fun for others. But because more than a dozen people have asked me about the Scala solutions or were unable to produce solutions below few hundred lines, I have decided to publish them anyways. And also for the benefit of the Scala programming language. But beware, solutions ahead.

The files with E in the filename contain explanation in the block comment at the beginning of the file.

Rules

While coding, I abide by the few simple rules:

  1. No "allnighters". The script has to produce a result in 5 seconds at the worst. In practice, it does even better, in a few millisecond range.
  2. Avoid code duplication. If some functionality is needed multiple times, extract it into the Helpers.scala library / file.
  3. Prune the search space as much as possible. If the task requires you to output the biggest result, make an iterator that generates results in order and just call .next on the resulting iterator. This way we avoid much of the unneeded calculation.

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