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21e7449350
commit
02d49f7dd6
2 changed files with 53 additions and 39 deletions
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@ -15,7 +15,7 @@ object AoC2017 extends Year {
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val reg = """(\d)(?=\1)""".r
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val matches = reg.findAllIn(input).toList
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val csum = matches.map(_.toInt).sum
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if(input.head == input.last) {
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if (input.head == input.last) {
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(csum + input.head.toString.toInt).toString
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} else {
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csum.toString
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@ -25,7 +25,7 @@ object AoC2017 extends Year {
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override def part2(input: String): String = {
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val (left, right) = input.splitAt(input.length / 2)
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val zipped = left.zip(right)
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val doubled = zipped.filter { case (l, r) => l == r}.map { case (c, _) => c.toString }
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val doubled = zipped.filter { case (l, r) => l == r }.map { case (c, _) => c.toString }
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(doubled.map(_.toInt).sum * 2).toString
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}
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@ -45,10 +45,12 @@ object AoC2017 extends Year {
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val lines = input.lines.toList
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val rows = lines.map(_.split("""\s+""").map(_.toInt))
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rows.flatMap { r =>
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val q = r.zipWithIndex.flatMap { case (e, i) =>
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r.drop(i + 1).map(f => {
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val q = r.zipWithIndex.flatMap {
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case (e, i) =>
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r.drop(i + 1)
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.map(f => {
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val (min, max) = (Math.min(e, f), Math.max(e, f))
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if(max % min == 0) {
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if (max % min == 0) {
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Some(max / min)
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} else {
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None
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@ -99,7 +101,13 @@ object AoC2017 extends Year {
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case object MoveRight extends Direction {
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override def change: Int = 1
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}
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case class Program(beginIn: State, diagnosticCount: Int, states: Map[State, InState], index: Int = 0, tape: Map[Int, Int] = Map()) {
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case class Program(
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beginIn: State,
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diagnosticCount: Int,
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states: Map[State, InState],
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index: Int = 0,
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tape: Map[Int, Int] = Map()
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) {
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def step: Program = {
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val ndc = diagnosticCount - 1
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@ -118,22 +126,28 @@ object AoC2017 extends Year {
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}
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def stateParser[_: P]: P[State] = P( "state" ~ CharIn("A-Z").rep.! ).map(State)
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def writeParser[_: P]: P[Int] = P( "- Write the value" ~ ("0" | "1").! ~ "." ).map(_.toInt)
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def directionParser[_: P]: P[Direction] = P( "- Move one slot to the" ~ ("left" | "right").! ~ "." ).map {
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def stateParser[_: P]: P[State] = P("state" ~ CharIn("A-Z").rep.!).map(State)
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def writeParser[_: P]: P[Int] = P("- Write the value" ~ ("0" | "1").! ~ ".").map(_.toInt)
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def directionParser[_: P]: P[Direction] = P("- Move one slot to the" ~ ("left" | "right").! ~ ".").map {
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case "left" => MoveLeft
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case "right" => MoveRight
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}
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def stateChangeParser[_: P]: P[State] = P("- Continue with" ~ stateParser ~ ".")
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def branchParser[_: P]: P[Branch] = P( writeParser ~ directionParser ~ stateChangeParser ).map {
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def branchParser[_: P]: P[Branch] = P(writeParser ~ directionParser ~ stateChangeParser).map {
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case (write, dir, state) => Branch(write, dir, state)
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}
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def inStateParser[_: P]: P[InState] = P(
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def inStateParser[_: P]: P[InState] =
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P(
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"In" ~ stateParser ~ ":" ~ "If the current value is 0:" ~ branchParser ~ "If the current value is 1:" ~ branchParser
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).map {
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case (state, v0, v1) => InState(state, v0, v1)
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}
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def programParser[_: P]: P[Program] = P(
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def programParser[_: P]: P[Program] =
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P(
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"Begin in" ~ stateParser ~ "." ~
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"Perform a diagnostic checksum after" ~ CharIn("0-9").rep(1).!.map(_.toInt) ~ "steps." ~
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inStateParser.rep.map(f => {
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@ -11,7 +11,7 @@ val sharedSettings = Seq(
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mainClass := Some("tf.bug.aoc.Main"),
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)
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lazy val aoc = crossProject(JSPlatform, JVMPlatform /* , NativePlatform */)
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lazy val aoc = crossProject(JSPlatform, JVMPlatform /* , NativePlatform */ )
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.crossType(CrossType.Pure)
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.settings(sharedSettings)
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