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2019/Scala/day02/Day2.scala

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+package day02
+
+class Day2 {
+
+  /** Find solution for part1 */
+  def solveP1(arr: Array[Int]): Int =
+  {
+    var i = 0
+    while (arr(i) == 1 || arr(i) == 2)
+    {
+      arr(i) match {
+        case 1 => arr(arr(i + 3)) = arr(arr(i + 1)) + arr(arr(i + 2)); i += 4
+        case 2 => arr(arr(i + 3)) = arr(arr(i + 1)) * arr(arr(i + 2)); i += 4
+        case _ => ()
+      }
+    }
+    arr(0)
+  }
+
+  /** Find fuel needed and recursive fuel */
+  def solveP2(arr:Array[Int]):(Int, Int) =
+  {
+    var tuple = (0, 0)
+    for (i <- 0 to 99; j <- 0 to 99)
+    {
+      val copy = arr.clone()
+      copy(1) = i
+      copy(2) = j
+      if (solveP1(copy) == 19690720) tuple = (i, j)
+    }
+    tuple
+  }
+
+}

2019/Scala/day02/Main.scala

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+package day02
+
+import kamlib.{Reader, Wrapper}
+
+object Main
+{
+  /** MAIN */
+  def main(args: Array[String]): Unit =
+  {
+
+    val solution: Day2 = new Day2
+    val input: Array[Int] = Reader.readString("/input1.txt").split("\\D+").map(x => x.toInt)
+    val copy: Array[Int] = input.clone()
+    copy(1) = 12
+    copy(2) = 2
+
+    println("Part 1")
+    Wrapper(solution.solveP1(input)).print()
+    println("Part 2")
+    Wrapper(solution.solveP2(input)).print()
+  }
+
+}

2019/Scala/day02/worksheet2.sc

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+import scala.io.Source
+
+var original = Source.fromFile(getClass.getResource("/input2.txt").getFile).mkString.split("\\D+").map(x => x.toInt)
+original(1) = 12
+original(2) = 2
+var copy1 = original.clone()
+
+// 1
+def tapeTraversal1(arr:Array[Int]):Int =
+{
+  var i = 0
+  while (arr(i) == 1 || arr(i) == 2)
+  {
+    arr(i) match {
+      case 1 => arr(arr(i + 3)) = arr(arr(i + 1)) + arr(arr(i + 2)); i += 4
+      case 2 => arr(arr(i + 3)) = arr(arr(i + 1)) * arr(arr(i + 2)); i += 4
+      case _ => ()
+    }
+  }
+  arr(0)
+}
+val result1 = tapeTraversal1(copy1)
+
+// 2
+def bruteForce2(arr:Array[Int]):(Int, Int) =
+{
+  var tuple = (0, 0)
+  for (i <- 0 to 99; j <- 0 to 99)
+  {
+    var copy = arr.clone()
+    copy(1) = i
+    copy(2) = j
+    if (tapeTraversal1(copy) == 19690720) tuple = (i, j)
+  }
+  tuple
+}
+
+val result2 = bruteForce2(original)
+
+
+
+
+