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kamoshi 2019-12-06 22:26:25 +01:00 committed by GitHub
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2019/Scala/day01/worksheet1.sc
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import scala.io.Source
val lines = Source.fromFile(getClass.getResource("/input1.txt").getFile).getLines().toList
// 1
val result1 = lines.foldLeft (0) { (acc, i) => acc + (i.toInt/3-2)}
println(result1)
// 2
@scala.annotation.tailrec
def findRecursiveFuel(fuel:Int, acc:Int):Int =
{
val nextFuel = (fuel/3)-2
if (nextFuel <= 0) acc
else findRecursiveFuel(nextFuel, nextFuel+acc)
}
val result2 = lines.foldLeft (0) { (acc, i) => acc + findRecursiveFuel(i.toInt, 0)}
println(result2)