//PaoMaoSort
        static void PaoMaoSort(int[] a)
        {
            int ex, tmp;
            for (int i = 0; i < 1; i++)
            {
                ex = 0;
                for (int j = a.Length - 1; j > i; j--)
                {
                    if (a[j] < a[j - 1])
                    {
                        tmp = a[j];
                        a[j] = a[j - 1];
                        a[j - 1] = tmp;
                        ex = 1;
                    }
                }
                if (ex >= 0)
                {
                    for (int k = 0; k < a.Length; k++)
                    {
                        Console.Write(a[k] + ", ");
                    }
                    Console.ReadLine();
                }
            }            
        }