Problem:
Bubble Sort

Write a program of the Bubble Sort algorithm which sorts a sequence A in ascending order. The algorithm should be based on the following pseudocode:

BubbleSort(A)
1 for i = 0 to A.length-1
2 for j = A.length-1 downto i+1
3 if A[j] < A[j-1]
4 swap A[j] and A[j-1]

Note that, indices for array elements are based on 0-origin.

Your program should also print the number of swap operations defined in line 4 of the pseudocode.

Input

The first line of the input includes an integer N, the number of elements in the sequence.

In the second line, N elements of the sequence are given separated by spaces characters.

Output

The output consists of 2 lines.

In the first line, please print the sorted sequence. Two contiguous elements of the sequence should be separated by a space character.

In the second line, please print the number of swap operations.

Constraints

1 ≤ N ≤ 100

Sample Input 1

5
5 3 2 4 1

Sample Output 1

1 2 3 4 5
8

Sample Input 2

6
5 2 4 6 1 3

Sample Output 2

1 2 3 4 5 6
9

Solution in Scala (judge verdict: Accepted)

import java.util.Scanner

object Main extends App {

  val sc = new Scanner(System.in)

  def nextInt() = sc.next.toInt

  def swap(x: Int, xs: (List[Int], Int)) = {
    val (lst, cnt) = xs
    lst match {
      case List() => (List(x), cnt)
      case y :: ys =>
        if (x > y) (y :: x :: ys, cnt + 1)
        else (x :: lst, cnt)
    }
  }

  def bubble1(xs: List[Int]): (List[Int], Int) = xs match {
    case List()   => (List(), 0)
    case x :: xs1 => swap(x, bubble1(xs1))
  }

  def bubbleSort(xs: List[Int], cnt: Int): (List[Int], Int) = {
    val (lst, n) = bubble1(xs)
    if (n == 0)
      (lst, cnt)
    else
      bubbleSort(lst, cnt + n)
  }

  val n = nextInt
  val xs = List.fill(n)(nextInt)

  val (lst, cnt) = bubbleSort(xs, 0)
  println(lst.mkString(" "))
  println(cnt)
}