64 lines
1.4 KiB
Scala
64 lines
1.4 KiB
Scala
package day6
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import scala.collection.mutable
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import scala.io.Source
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case class Node(name: String)
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{
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val connections = new mutable.ArrayBuffer[Node]
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def markVisited(depth: Int, visited: mutable.HashSet[Node], distances: mutable.HashMap[String, Int]): Unit =
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{
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connections.foreach(x => {
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if (!visited.contains(x))
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{
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visited.add(x)
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distances.addOne(x.name, depth)
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x.markVisited(depth+1, visited, distances)
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}
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})
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}
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}
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object Main {
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/** list of tuples */
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val input: List[(String, String)] = Source.fromFile(getClass.getResource("/input6.txt").getFile).getLines().map(x =>
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{
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val split = x.split(')')
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(split(0), split(1))
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}).toList
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/** Easy access to all nodes */
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val nodes = new mutable.HashMap[String, Node]
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input.foreach(tuple =>
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{
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val (a , b) = tuple
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if (!nodes.contains(a)) nodes.addOne(a, new Node(a))
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if (!nodes.contains(b)) nodes.addOne(b, new Node(b))
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})
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input.foreach(tuple =>
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{
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val (a , b) = tuple
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nodes(a).connections += nodes(b)
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nodes(b).connections += nodes(a)
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})
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/** Visited nodes */
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val visited = new mutable.HashSet[Node]
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/** Easy access to all nodes */
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val distances = new mutable.HashMap[String, Int]
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def main(args: Array[String]): Unit = {
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println("Starting program...")
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val start = nodes("YOU")
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start.markVisited(0, visited, distances)
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println(distances("SAN") - 1)
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println("Program finished...")
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}
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}
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