EncryptedMatrix

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


class EncryptedMatrix
{
    static void Main()
    {
        string message = Console.ReadLine();
        char direction = char.Parse(Console.ReadLine());
        char[] splited = message.ToCharArray();
        int[] number = new int[splited.Length];
        List<int> encryptNumber = new List<int>();

        for (int i = 0; i < splited.Length; i++)
        {
            number[i] = Convert.ToInt32(splited[i]);
            number[i] = number[i] % 10;
        }

        for (int i = 0; i < number.Length; i++)
        {
            if (number[i] % 2 == 0 || number[i] == 0)
            {
                int multiply = number[i] * number[i];
                if (multiply >= 10)
                {
                    encryptNumber.Add(multiply / 10);
                    encryptNumber.Add(multiply % 10);
                }
                else
                {
                    encryptNumber.Add(number[i] * number[i]);
                }
            }
            if (number[i] % 2 != 0)
            {
                if (i == 0 && i == number.Length - 1)
                {
                    encryptNumber.Add(number[i]);
                }
                else if (i == 0)
                {
                    int sum = (number[i] + number[i + 1]);
                    if (sum >= 10)
                    {
                        encryptNumber.Add(sum / 10);
                        encryptNumber.Add(sum % 10);
                    }
                    else
                    {
                        encryptNumber.Add(number[i] + number[i + 1]);
                    }
                }
                else if (i == number.Length - 1)
                {
                    int sum = (number[i] + number[i - 1]);
                    if (sum >= 10)
                    {
                        encryptNumber.Add(sum / 10);
                        encryptNumber.Add(sum % 10);
                    }
                    else
                    {
                        encryptNumber.Add(number[i] + number[i - 1]);
                    }
                }
                else
                {
                    int sum = (number[i] + number[i - 1] + number[i + 1]);
                    if (sum >= 10)
                    {
                        encryptNumber.Add(sum / 10);
                        encryptNumber.Add(sum % 10);
                    }
                    else
                    {
                        encryptNumber.Add(number[i] + number[i - 1] + number[i + 1]);
                    }
                }
            }
        }

        switch (direction)
        {
            case '\\':
                for (int i = 0; i < encryptNumber.Count; i++)
                {
                    for (int j = 0; j < encryptNumber.Count; j++)
                    {
                        if (i == j)
                        {
                            Console.Write(encryptNumber[j] + " ");
                        }
                        else
                        {
                            Console.Write("{0} ", 0);
                        }
                    }
                    Console.WriteLine();
                }
                break;
            case '/':
                for (int i = encryptNumber.Count - 1; i >= 0; i--)
                {
                    for (int j = 0; j < encryptNumber.Count; j++)
                    {
                        if (i == j)
                        {
                            Console.Write(encryptNumber[j] + " ");
                        }
                        else
                        {
                            Console.Write("{0} ", 0);
                        }
                    }
                    Console.WriteLine();
                }
                break;
        }
    }
}