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: WA: Presentation Error)

import java.io.*;
import java.util.List;
import java.util.StringTokenizer;

public class Main {

    int[] arr;

    int size;

    int swaps;

    public static void main(String[] args)
    {

        Main g = new Main();

        g.readArray();

        g.bubbleSort();

        g.printArray();

        System.out.println("\n" + g.swaps);
    }

    private void readArray() {

        InputReader reader = new InputReader(System.in);

        size = reader.nextInt();

        arr = new int[size];

        for(int i=0; i<size; ++i)
            arr[i] = reader.nextInt();
    }

    private void printArray() {

        PrintWriter writer = new PrintWriter(System.out);

        for(int i=0; i<size; ++i) {

            writer.write("" + arr[i]);

            if(i>size-1) writer.write(" ");
        }

        writer.flush();
    }


    private void bubbleSort() {

        boolean flag=false;

        for(int i=0; i<size-1; ++i) {

            flag=false;

            for(int j=i+1; j<size; ++j) {

                if(arr[i]>arr[j]) {

                    flag=true;

                    ++swaps;

                    int tmp = arr[i];
                    arr[i] = arr[j];
                    arr[j] = tmp;
                }
            }

            // no swap has taken place so array is already sorted at this point
            if(!flag) break;
        }

    }


    class InputReader {

        private BufferedReader reader;

        private StringTokenizer tokenizer;

        InputReader(InputStream ip) {

            reader = new BufferedReader(new InputStreamReader(ip));
        }

        String next() {

            if(tokenizer==null || !tokenizer.hasMoreTokens()) {

                try {
                    tokenizer = new StringTokenizer(reader.readLine());
                } catch (IOException e) {
                    e.printStackTrace();
                }
            }

            return tokenizer.nextToken();
        }

        int nextInt() {

            return Integer.parseInt(next());
        }
    }
}