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Merged
nmcb merged 1 commit into from
Feb 8, 2026
Merged

layout #36

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12 changes: 6 additions & 6 deletions 2016/src/main/scala/aoc2016/Day07.scala
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Original file line number Diff line number Diff line change
Expand Up @@ -14,11 +14,11 @@ object Day07 extends AoC:
def hasTLS: Boolean =
supernets.exists(_.sliding(4).exists(isAbba)) && !hypernets.exists(_.sliding(4).exists(isAbba))

private def isAba(s: String, containing: Option[(Char,Char)] = None): Option[(Char,Char)] =
private def isAba(s: String, containing: Option[(Char, Char)] = None): Option[(Char, Char)] =
containing match
case None =>
Option.when(s.length == 3 && s(0) != s(1) && s == s.reverse)((s(0), s(1)))
case Some((outer,inner)) =>
case Some((outer, inner)) =>
Option.when(s.length == 3 && s(0) != s(1) && s == s.reverse && s(0) == outer && s(1) == inner)((s(0), s(1)))

def hasSSL: Boolean =
Expand All @@ -34,12 +34,12 @@ object Day07 extends AoC:
def loop(todo: String, supernet: Boolean = true, supernets: Vector[String] = Vector.empty, hypernets: Vector[String] = Vector.empty): IP =
val chars = if supernet then todo.takeWhile(_ != '[') else todo.takeWhile(_ != ']')
val rest = todo.drop(chars.length + 1)
val nsupernets = if supernet then supernets :+ chars else supernets
val nhypernets = if !supernet then hypernets :+ chars else hypernets
val nextSupernets = if supernet then supernets :+ chars else supernets
val nextHypernets = if !supernet then hypernets :+ chars else hypernets
if rest.length > 1 then
loop(rest, !supernet, nsupernets, nhypernets)
loop(rest, !supernet, nextSupernets, nextHypernets)
else
IP(nsupernets, nhypernets)
IP(nextSupernets, nextHypernets)
loop(s)

val ips: Vector[IP] = lines.map(IP.fromString)
Expand Down