import scala.collection.mutable

import scala.collection.mutable.{HashMap, PriorityQueue}

object Main {

  def reorganizeResults(initialOrder: String): String = {

    val map = new HashMap[Character, Int](){override def default(key:Character) = 0  }

    for (c <- initialOrder.toCharArray) {

      val freq = map(c) + 1

      if (freq > (initialOrder.length + 1) / 2)

        return initialOrder

      if(map.contains(c)){

        map(c) = freq

      }

      else{

        map(c) += 1

      }

​

    }

    val pq = new PriorityQueue[Array[Int]]()((a, b) => a(1) - b(1))

    for (c <- map.keySet) {

      pq += Array[Int](c.toInt, map(c))

    }

​

​

    var result = new StringBuilder

    while (!pq.isEmpty) {

      var first = pq.dequeue()

      if (result.length == 0 || first(0) != result.charAt(result.length - 1)) {

        result.append(first(0).toChar)

        first(1) -= 1;

        if (first(1) > 0) {

          pq += first

        }

      }

      else if(!pq.isEmpty) {

        var second = pq.dequeue()

        result.append(second(0).toChar)

        second(1) -= 1;

        if (second(1) > 0) {

          pq += second

        }

        pq += first

      }

    }

    result.toString

  }

​

  def main(args: Array[String]): Unit = {

    val initialOrder = "bbbnnccn"

    println(reorganizeResults(initialOrder))

  }

}