Project Euler Problem Update #6

Some more solutions.

Problem 87 was my 50th problem and I’m now at Level 2 at Project Euler.

In addition to advancing me to the next level, Problem 87 (or rather the gurus who’d solved it before me) reminded me of an important feature of Java Sets… They do not allow duplicates. Very important lesson indeed, since changing solution from List to Set made my solution execute almost 400 times faster 🙂

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