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 C# (judge verdict: Accepted)

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using static System.Console;
using static System.Math;

namespace Topic02
{
    class ALDS1_2_A
    {
        static void Main(string[] args)
        {
            int N = int.Parse(ReadLine());
            int[] A = ReadLine().Split()
                .Select(n => int.Parse(n)).ToArray();

            bool flag = true;
            int result = 0;
            while (flag)
            {
                flag = false;
                for (int j = N - 1; j >= 1; j--)
                {
                    if (A[j] < A[j - 1])
                    {
                        int tmp = A[j];
                        A[j] = A[j - 1];
                        A[j - 1] = tmp;
                        result++;
                        flag = true;
                    }
                }
            }

            StringBuilder sb = new StringBuilder();
            for (int j = 0; j < N; j++)
            {
                sb.Append(A[j].ToString() + " ");
            }
            WriteLine(sb.Remove(sb.Length - 1, 1));
            WriteLine(result.ToString());
            ReadKey();
        }
    }
}