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.Scanner;

class Main{
    public static void main(String[] args){
        Scanner sc = new Scanner(System.in);

        int n = Integer.parseInt(sc.nextLine());
        int[] array = new int[n];
        String[] input = sc.nextLine().split(" ");
        
        for(int i = 0; i < n; i++){
            array[i] = Integer.parseInt(input[i]);
        }

        int count = 0;
        int k = 0;
        while(k < n-1){
            for(int i = n-1; i > k; i--){
                if(array[i] < array[i-1]){
                    int tmp = array[i];
                    array[i] = array[i-1];
                    array[i-1] = tmp;
                    count++;
                }
            }
            k++;
        }

        StringBuilder sb = new StringBuilder();

        for(int i : array)
            sb.append(i + " ");
        
        sb.deleteCharAt(sb.length()-1);

        System.out.println(sb);
        System.out.println(count);
    }
}