using System;
using System.Collections.Generic;
using System.Linq;

namespace Program5
{
    class Program
    {
        public static void Main(string[] args)
        {
            var numbers = new int[100, 10000];
            List<int> res = new List<int>();
            for (var j = 1; j <= 99; j++)
                for (var i = 123; i <= 9999; i++)
                {
                    if (GetDifference(numbers[j, i], j, i) && numbers[j, i].ToString().Length == 4)
                        res.Add(numbers[j, i]);
                    if (GetRightNumbers(j) && GetMultiply(j, i) && GetRightNumbers(i) &&
                        (j.ToString().Length + i.ToString().Length == 5))
                        numbers[j, i] = j * i;
                }

            Console.WriteLine(res.Distinct().Sum(z => z));
            Console.ReadKey();
        }

        public static bool GetMultiply(int j, int i)
        {
            var stringJ = j.ToString();
            var stringI = i.ToString();
            foreach (var e in stringJ)
                if (stringI.Contains(e))
                    return false;
            return true;
        }

        public static bool GetDifference(int number, int j, int i)
        {
            List<char> result = new List<char>();
            var stringJ = j.ToString();
            var stringI = i.ToString();
            var stringOfNumbers = number.ToString();
            if (!GetRightNumbers(number))
                return false;
            foreach (var itemJ in stringJ)
                foreach (var itemI in stringI)
                {
                    if (stringOfNumbers.Contains(itemJ) || stringOfNumbers.Contains(itemI))
                        return false;
                }

            return true;
        }
        public static bool GetRightNumbers(int num)
        {
            var digitalCount = 0;
            List<int> result = new List<int>();
            HashSet<int> list = new HashSet<int>();
            while (num > 0)
            {
                var mod10 = num % 10;
                result.Add(mod10);
                if (!list.Add(mod10) || mod10 == 0)
                    break;
                num /= 10;
                digitalCount++;
            }
            return (digitalCount == result.Count) ? true : false;
        }
    }
}