C# ACM poj1002

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        public static void acm1002(string[] azx)
        {

            string[] a = new string[azx.Length];
            for (int i = 0; i < azx.Length; i++)
            {
                StringBuilder sb = new StringBuilder();
                azx[i] = azx[i].Replace("-", "");
                for (int j = 0; j < azx[i].Length; j++)
                {

                    char cr = azx[i][j];
                    if (cr == 'A' || cr == 'B' || cr == 'C')
                    {
                        sb.Append("2");
                    }
                    else if (cr == 'D' || cr == 'E' || cr == 'F')
                    {
                        sb.Append("3");
                    }
                    else if (cr == 'G' || cr == 'H' || cr == 'I')
                    {
                        sb.Append("4");
                    }
                    else if (cr == 'J' || cr == 'K' || cr == 'L')
                    {
                        sb.Append("5");
                    }
                    else if (cr == 'M' || cr == 'N' || cr == 'O')
                    {
                        sb.Append("6");
                    }
                    else if (cr == 'P' || cr == 'R' || cr == 'S')
                    {
                        sb.Append("7");
                    }
                    else if (cr == 'T' || cr == 'U' || cr == 'V')
                    {
                        sb.Append("8");
                    }
                    else if (cr == 'W' || cr == 'X' || cr == 'Y')
                    {
                        sb.Append("9");
                    }
                    else
                    {
                        sb.Append(cr);
                    }
                }
                a[i] = sb.ToString();
            }
            int[] items = new int[a.Length];
            int bbbb = 0;
            foreach (var item in a)
            {

                items[bbbb] = Convert.ToInt32(item);
                bbbb++;
                
            }           
            QSortDIY(items, 0, items.Length - 1);
           // Console.WriteLine(string.Join(",", items));
            Dictionary<int, int> dic = new Dictionary<int, int>();
            foreach (var item in items)
            {
                if (!dic.ContainsKey(item))
                {
                    dic.Add(item, 1);
                }
                else
                {
                    dic[item]++;
                }
            }
            foreach (var item in dic)
            {
                if (item.Value!=1)
                {
                    string s = item.Key.ToString();
                    s= s.Insert(3, "-");
                    Console.WriteLine(s+ " " + item.Value);
                }
            }
        
        }

        public static void MPSort(int[] array)
        {
            int tep;
            for (int i = 0; i < array.Length - 1; i++)
            {
                for (int j = 0; j < array.Length - i - 1; j++)
                {
                    if (array[j] > array[j + 1])
                    {
                        tep = array[j + 1];
                        array[j + 1] = array[j];
                        array[j] = tep;
                    }
                }
            }
        }

        public static void QSortDIY(int[] array, int low, int high)
        {
            if (low >= high)
            {
                return;
            }
            int ie = QSortUnit(array, low, high);
            QSortDIY(array, low, ie - 1);
            QSortDIY(array, ie + 1, high);
        }
        private static int QSortUnit(int[] array, int low, int high)
        {
            int key = array[low];
            while (low < high)
            {
                while (array[high] >= key && high > low)
                {
                    --high;
                }
                array[low] = array[high];
                while (array[low] <= key && high > low)
                {

                    ++low;
                }
                array[high] = array[low];
            }
            array[low] = key;
            return high;
        }