38.02.Dancing Bits решение със стринг

using System;
class DancingBits
{
    static void Main()
    {
        int k = int.Parse(Console.ReadLine());
        int n = int.Parse(Console.ReadLine());
        int len = 0, index = 0, sequence = 0;
        char lastChar = ' ', charOne =' ';
        string number = "";
        for (int i = 0; i < n; i++)
        {
            int input = int.Parse(Console.ReadLine());
            number += Convert.ToString(input, 2);
        }
        do
        {
            charOne = number[index];
            if(lastChar == charOne)
            {
                len++;
            }
            else
            {
                if (len == k)
                {
                    sequence++;
                }
                len = 1;
            }
            lastChar = charOne;
            index++;
        }while (index < number.Length);

        if(len == k)
        {
            sequence++;
        }
        Console.WriteLine(sequence);
    }
}