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;

public class Main {
    static int bubbleSort(int[] data) {
        int ret = 0, n = data.length;
        for (int i = 0; i < n - 1; ++i) {
            for (int j = 0; j < n - 1; ++j) {
                if (data[j] > data[j + 1]) {
                    ++ret;
                    int tmp = data[j];
                    data[j] = data[j + 1];
                    data[j + 1] = tmp;
                }
            }
        }
        return ret;
    }

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

        int n = scanner.nextInt();
        int[] data = new int[n];

        for (int i = 0; i < n; ++i) {
            data[i] = scanner.nextInt();
        }

        int cnt = bubbleSort(data);
        for (int i = 0; i < n; ++i) {
            System.out.print(data[i]);
            if (i != n - 1) System.out.print(" ");
        }
        System.out.println();
        System.out.println(cnt);
    }
}