TextGravity

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace TextGravity
{
    class TextGravity
    {
        static void Main(string[] args)
        {
            int length = int.Parse(Console.ReadLine());
            string inputLine = Console.ReadLine();
            int arrayCount = inputLine.Length / length;
            if(inputLine.Length % length != 0)
            {
                arrayCount += 1;
            }
            char[,] matrix = new char[arrayCount,length];
            int counter = 0;
            for (int row = 0; row < matrix.GetLength(0); row++)
            {
                for (int col = 0; col < matrix.GetLength(1); col++)
                {
                    if(counter == inputLine.Length)
                    {
                        matrix[row, col] = ' ';
                        continue;
                    }
                    else
                    {
                       matrix[row, col] = (char)inputLine[counter];
                        counter++;
                    }
                }
            }

            bool aCharFellDown = true;
            while(aCharFellDown)
            {
                aCharFellDown = false;
                for (int row = 0; row < matrix.GetLength(0) - 1; row++)
                {
                    for (int col = 0; col < matrix.GetLength(1); col++)
                    {
                        if(matrix[row,col]!= ' ' && matrix[row + 1,col] == ' ')
                        {
                            char temp = matrix[row + 1,col];
                            matrix[row + 1, col] = matrix[row, col];
                            matrix[row, col] = temp;
                            aCharFellDown = true;
                        }
                    }
                }
            }

            for (int r = 0; r < matrix.GetLength(0); r++)
            {
                if(r == 0)
                {
                    Console.Write("<table>");
                }
                
                Console.Write("<tr>");
                
                for (int c = 0; c <matrix.GetLength(1); c++)
                {
                    Console.Write("<td>"+matrix[r,c]+"</td>");
                }
                Console.Write("</tr>");
            }
            Console.WriteLine("</table>");
        }
    }
}