/TheRepeater.scala Secret
Created
June 13, 2014 14:19
The Repeater
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import scala.io.Source | |
import scala.annotation.tailrec | |
object Main { | |
def solve(input: List[String]): Option[Int] = { | |
case class TextAndCounts(text: String, counts: List[Int]) | |
def countAndSimplify(text: String) = { | |
text.foldLeft(TextAndCounts("", List()))((acc, x) => | |
if (0 < acc.text.length && acc.text.last == x) | |
acc.copy(counts = acc.counts.init :+ (acc.counts.last + 1)) | |
else | |
TextAndCounts(acc.text + x, acc.counts :+ 1)) | |
} | |
if (1 < input.map(countAndSimplify).map(_.text).toSet.size) { | |
None | |
} else { | |
val charCounts = input.map(countAndSimplify).map(_.counts) | |
val charCountsByCol = (0 until charCounts(0).length) map (i => charCounts.map(x => x(i))) | |
val medians = charCountsByCol.map(_.sorted).map(x => x(x.length / 2)) | |
val differences = (0 until charCountsByCol.length) map (i => charCountsByCol(i).map(x => Math.abs(x - medians(i)))) | |
Some(differences.map(_.sum).sum) | |
} | |
} | |
def main(args: Array[String]) { | |
val lines = Source.fromFile("A-large-practice.in").getLines() | |
val caseNum = lines.next().toInt | |
1 to caseNum foreach { caseIndex => | |
{ | |
val loopSize = lines.next().toInt | |
val inputs = for (i <- 0 until loopSize) yield lines.next() | |
val result = solve(inputs.toList) match { | |
case None => "Fegla Won" | |
case Some(x) => x | |
} | |
println(s"Case #$caseIndex: $result") | |
} | |
} | |
} | |
} |
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