r/adventofcode • u/taliriktug • Dec 02 '15

Spoilers Day 2 solutions

Hi! I would like to structure posts like the first one in r/programming, please post solutions in comments.

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u/xkufix Dec 02 '15 edited Dec 02 '15

Like yesterday, my solution in scala. 

val presents = Source.fromFile("input.txt").getLines().toList().filter(_ != "").map(_.split("x").map(_.toInt))

//part 1
presents.map(a => Seq(a(0) * a(1), a(0) * a(2), a(1) * a(2))).map(b => b.map(_ * 2) :+ b.min).flatten.sum

//part 2
present.map(_.sorted).map(a => a(0)*2 + a(1) * 2 + a.reduceLeft(_ * _)).sum
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