lab2_2

using System;

class Program
{
    public static int Func (int num)
    {
        int ser = 1, prefSer = 1, pref = -1, cur;
        num *= 10;

        do
        {
            num /= 10;
            cur = num % 10;

            if(cur == pref)
                ser++;
            else
            {
                if(ser > prefSer)
                    prefSer = ser;
                ser = 1;
            }
            pref = cur;
        }
        while (num > 10);

        return ser > prefSer ? ser : prefSer;
    }

    static void Main(string[] args)
    {
        int num;
        int.TryParse(Console.ReadLine(), out num);
        Console.WriteLine(Func(num));
        Console.ReadKey();
    }
}