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 JAVA (judge verdict: Accepted)

import java.util.*;
import java.io.*;
public class Main {
	static int n = 0;
	
	public static void bubble_sort(int[] a) {
		int swapCount = 0;
		for (int i = 0; i < n; i++) {
			
			// search for unsorted pairs from the back
			for (int j = n-1; j > i; j--) {
				if (a[j] < a[j-1]) {
					
					// swap a[j], a[j-1]
					int tmp = a[j];
					a[j] = a[j-1];
					a[j-1] = tmp;
					
					// increase swapCount
					swapCount++;
				}
			}
			
			// print sorted elements
			if (i < n-1) System.out.print(a[i] + " "); 
			else
				System.out.println(a[i]);
		}
		
		// print swapCount on a new line
		System.out.println(swapCount);
	}
	
	public static void main (String args[]) {
		@SuppressWarnings("resource")
		Scanner sc = new Scanner(System.in);
		n = sc.nextInt();
		int[] a = new int[n];
		for (int i = 0; i < n; i++) 
			a[i] = sc.nextInt();
		bubble_sort(a);
	}
}