static void Main(string[] args)
 {
            string pattern = Console.ReadLine();
            string numberStr = Console.ReadLine();
            int number;
            while (!int.TryParse(numberStr,out number) | numberStr.Length != pattern.Length)
            {
                Console.WriteLine($"Ошибка!\n Введите {pattern.Length} значное число!");
                numberStr = Console.ReadLine();
            }
            Console.WriteLine(GetResult(number));

        }
        public static int GetResult(int number)
        {
            int[] arrDigits = new int[(int)Math.Log10(number) + 1];

            for(int i =0;i< arrDigits.Length;i++)
            {
                arrDigits[i] = number % 10;
                number = number / 10;
            }
            arrDigits = arrDigits.OrderBy(item => item).Reverse().ToArray();
            Array.Resize(ref arrDigits, arrDigits.Length - 2);
            int result = 0;
            for (int i = 0;i < arrDigits.Length;i++)
            {
                result += arrDigits[i] * (int)Math.Pow(10,arrDigits.Length - i - 1);
            }
            return result;
        }