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Aly 2018-11-24 16:30:29 -08:00
parent 21e7449350
commit 02d49f7dd6
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GPG Key ID: 555B7346639DDAC3
2 changed files with 53 additions and 39 deletions
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24
aoc/src/main/scala/aoc/AoC2017.scala
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@ -45,8 +45,10 @@ object AoC2017 extends Year {
val lines = input.lines.toList
val rows = lines.map(_.split("""\s+""").map(_.toInt))
rows.flatMap { r =>
val q = r.zipWithIndex.flatMap { case (e, i) =>
r.drop(i + 1).map(f => {
val q = r.zipWithIndex.flatMap {
case (e, i) =>
r.drop(i + 1)
.map(f => {
val (min, max) = (Math.min(e, f), Math.max(e, f))
if (max % min == 0) {
Some(max / min)
@ -99,7 +101,13 @@ object AoC2017 extends Year {
case object MoveRight extends Direction {
override def change: Int = 1
}
case class Program(beginIn: State, diagnosticCount: Int, states: Map[State, InState], index: Int = 0, tape: Map[Int, Int] = Map()) {
case class Program(
beginIn: State,
diagnosticCount: Int,
states: Map[State, InState],
index: Int = 0,
tape: Map[Int, Int] = Map()
) {
def step: Program = {
val ndc = diagnosticCount - 1
@ -120,20 +128,26 @@ object AoC2017 extends Year {
def stateParser[_: P]: P[State] = P("state" ~ CharIn("A-Z").rep.!).map(State)
def writeParser[_: P]: P[Int] = P("- Write the value" ~ ("0" | "1").! ~ ".").map(_.toInt)
def directionParser[_: P]: P[Direction] = P("- Move one slot to the" ~ ("left" | "right").! ~ ".").map {
case "left" => MoveLeft
case "right" => MoveRight
}
def stateChangeParser[_: P]: P[State] = P("- Continue with" ~ stateParser ~ ".")
def branchParser[_: P]: P[Branch] = P(writeParser ~ directionParser ~ stateChangeParser).map {
case (write, dir, state) => Branch(write, dir, state)
}
def inStateParser[_: P]: P[InState] = P(
def inStateParser[_: P]: P[InState] =
P(
"In" ~ stateParser ~ ":" ~ "If the current value is 0:" ~ branchParser ~ "If the current value is 1:" ~ branchParser
).map {
case (state, v0, v1) => InState(state, v0, v1)
}
def programParser[_: P]: P[Program] = P(
def programParser[_: P]: P[Program] =
P(
"Begin in" ~ stateParser ~ "." ~
"Perform a diagnostic checksum after" ~ CharIn("0-9").rep(1).!.map(_.toInt) ~ "steps." ~
inStateParser.rep.map(f => {