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  1.   def walkTheLabyrinth: Karel = {
  2.     case class Solution(karel: Karel) extends Exception
  3.  
  4.     def destinationOpen(k: Karel, n: Int) {
  5.       if (k.causesPartition) return
  6.  
  7.       var karel = k.pickAllBeepers.turn(rng.nextInt(4))
  8.  
  9.       if (n <= 1) throw Solution(karel)
  10.  
  11.       val a = Array(karel.beepersIn(0), karel.beepersIn(1), karel.beepersIn(2), karel.beepersIn(3))
  12.       karel = karel.pickBeeperIn(0).pickBeeperIn(1).pickBeeperIn(2).pickBeeperIn(3)
  13.  
  14.       val twos = a.count(_ == 2)
  15.       if (twos == 0) {
  16.         for (i <- 0 to 3) {
  17.           if (a(i) > 0) {
  18.             destinationOpen(karel.tearDownWall.moveForward.turnAround.tearDownWall.turnAround, n - 1)
  19.           }
  20.           karel = karel.turnLeft
  21.         }
  22.       } else if (twos == 2) {
  23.         for (i <- 0 to 3) {
  24.           if (a(i) == 2) {
  25.             destinationOpen(karel.tearDownWall.moveForward.turnAround.tearDownWall.turnAround, n - 1)
  26.           }
  27.           karel = karel.turnLeft
  28.         }
  29.       } else if (twos == 1) {
  30.         for (i <- 0 to 3) {
  31.           if (a(i) == 2) {
  32.             destinationOpen(karel.tearDownWall.moveForward.turnAround.tearDownWall.turnAround, n - 1)
  33.           } else if (a(i) > 0) {
  34.             destinationFound(karel.tearDownWall.moveForward.turnAround.tearDownWall.turnAround, n - 1)
  35.           }
  36.           karel = karel.turnLeft
  37.         }
  38.       }
  39.     }
  40.  
  41.     def destinationFound(k: Karel, n: Int) {
  42.       if (k.causesPartition) return
  43.  
  44.       var karel = k.pickAllBeepers.turn(rng.nextInt(4))
  45.  
  46.       if (n <= 1) throw Solution(karel)
  47.  
  48.       val a = Array(karel.beepersIn(0), karel.beepersIn(1), karel.beepersIn(2), karel.beepersIn(3))
  49.       karel = karel.pickBeeperIn(0).pickBeeperIn(1).pickBeeperIn(2).pickBeeperIn(3)
  50.  
  51.       val twos = a.count(_ == 2)
  52.       if (twos == 0) {
  53.         for (i <- 0 to 3) {
  54.           if (a(i) > 0) {
  55.             destinationFound(karel.tearDownWall.moveForward.turnAround.tearDownWall.turnAround, n - 1)
  56.           }
  57.           karel = karel.turnLeft
  58.         }
  59.       } else if (twos == 1) {
  60.         for (i <- 0 to 3) {
  61.           if (a(i) == 2) {
  62.             destinationFound(karel.tearDownWall.moveForward.turnAround.tearDownWall.turnAround, n - 1)
  63.           }
  64.           karel = karel.turnLeft
  65.         }
  66.       }
  67.     }
  68.  
  69.     try {
  70.       destinationOpen(Karel(1, 1, EAST, labyrinth), N * N)
  71.       walkTheLabyrinthStatic
  72.     } catch {
  73.       case Solution(karel) =>
  74.         karel.dropBeeper.copy(x = 1, y = 1).turnAwayFromWall
  75.     }
  76.   }
  77.  
Compilation error #stdin compilation error #stdout 0s 0KB
comments (?)
stdin 
Standard input is empty
compilation info 
/opt/scala/bin/scalac: line 50: /dev/null: Permission denied
Main.scala:1: error: expected class or object definition
  def walkTheLabyrinth: Karel = {
  ^
one error found
spoj: The program compiled successfully, but Main.class was not found.
      Class Main should contain method: def main(args: Array[String]).
stdout 
Standard output is empty
https://ideone.com/hEh3hF
language:
Scala (scala 2.12.8)
created:
9 years ago
visibility:
secret

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