Dasha #2

using System;

namespace ConsoleApp2
{
    class Program
    {
        static void Main(string[] args)
        {
            string[] a = Console.ReadLine().Split(' ');

            long start = long.Parse(a[0]);
            long end = long.Parse(a[1]);

            int counter = 0;
            for (int i = 1; i < 10; i++)
            {
                int startPoint = i;
                long current = i;

                for (long j = 0; j < 18; j++)
                {
                    if ((current >= start) && (current <= end))
                    {
                        counter++;
                        current = current * 10 + startPoint;
                    }
                    else
                        break;
                }
            }
            Console.WriteLine(counter);
            Console.ReadKey();
        }
    }
}