sharpec

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.IO;
using System.Xml.Serialization;

namespace ConsoleApp6
{
    class Program
    {
        static void Main(string[] args)
        {
            FileStream fS = new FileStream("input.csv", FileMode.Open);
            StreamReader sR = new StreamReader(fS);
            List<int[,]> Matr = new List<int[,]>();
            string cur = "";
            int ind = 0;
            int indstr = 0;
            while ((cur = sR.ReadLine()) != null)
            {
                string[] str = cur.Split(',');
                int[] num = new int[str.Length];
                for (int i = 0; i < str.Length; i++)
                    if (!int.TryParse(str[i], out num[i]))
                    {
                        string cur1 = "";
                        for (int j = 0; j < str[i].Length; j++)
                            if (str[i][j] >= '0' & str[i][j] <= '9')
                                cur1 += str[i][j];
                        int.TryParse(cur1, out num[i]);

                    }
                if (Matr.Count == 0)
                {
                    Matr.Add(new int[num.Length, num.Length]);
                    indstr = num.Length;
                    for (int i = 0; i < Matr[ind].GetLength(1); i++)
                        Matr[ind][num.Length - indstr, i] = num[i];
                    indstr = num.Length - 1;

                    continue;
                }
                if (indstr > 0 & Matr[ind].GetLength(0) != num.Length)
                {

                    for (int i = Matr[ind].GetLength(0) - indstr; i < Matr[ind].GetLength(1); i++)
                        for (int j = 0; j < Matr[ind].GetLength(1); j++)
                            Matr[ind][i, j] = 0;
                    indstr = 0;
                }
                if (indstr == 0)
                {
                    ind++;

                    Matr.Add(new int[num.Length, num.Length]);
                    indstr = num.Length;
                    for (int i = 0; i < Matr[ind].GetLength(1); i++)
                        Matr[ind][num.Length - indstr, i] = num[i];
                    indstr = num.Length - 1;

                }
                else
                {
                    for (int i = 0; i < Matr[ind].GetLength(1); i++)
                        Matr[ind][num.Length - indstr, i] = num[i];
                    indstr--;
                }


            }
            foreach (var a in Matr)
            {
                for (int i = 0; i < a.GetLength(1); i++)
                    for (int j = 0; j < a.GetLength(1); j++)
                    {
                        Console.Write(a[i, j]);
                        if (j + 1 == a.GetLength(1))
                            Console.WriteLine();
                        else
                        {
                            Console.Write(" ");
                        }
                    }
                Console.WriteLine("-------------------------");
            }
            Console.WriteLine();
            IEnumerable<int[,]> mat = from a in Matr
                                      where MainDiag(a)
                                      select a;
            foreach (var a in mat)
            {
                for (int i = 0; i < a.GetLength(1); i++)
                    for (int j = 0; j < a.GetLength(1); j++)
                    {
                        Console.Write(a[i, j]);
                        if (j + 1 == a.GetLength(1))
                            Console.WriteLine();
                        else
                        {
                            Console.Write(" ");
                        }
                    }
                Console.WriteLine("-------------------------");
            }
            IEnumerable<int[,]> mat2 = from a in Matr
                                      where MainElement(a)
                                      select a;
            Console.WriteLine();
            foreach (var a in mat2)
            {
                for (int i = 0; i < a.GetLength(1); i++)
                    for (int j = 0; j < a.GetLength(1); j++)
                    {
                        Console.Write(a[i, j]);
                        if (j + 1 == a.GetLength(1))
                            Console.WriteLine();
                        else
                        {
                            Console.Write(" ");
                        }
                    }
                Console.WriteLine("-------------------------");
            }
            XmlSerializer xml = new XmlSerializer(typeof(int[,]));
            FileStream newfS = new FileStream("text.xml",FileMode.Create);
            foreach (var a in mat2)
                xml.Serialize(newfS,a);


        }
        static public bool MainDiag(int[,] a)
        {
            int z = 0;
            for(int i=0;i<a.GetLength(1);i++)
            {
                if (a[i, i] == 0)
                    z++;
            }
            return z >= 3;
        }
        static public bool MainElement(int[,] a)
        {
            int z = -100;
            int ind1 = -1;
            int ind2 = 0;
            for (int i = 0; i < a.GetLength(1); i++)
                for (int j = 0; j < a.GetLength(1); j++)
                    if (a[i, j] > z)
                    {
                        z = a[i, j];
                        ind1 = i;
                        ind2 = j;
                    }
                     else if(a[i, j] == z)
                    {
                        if(j>i)
                        {
                            ind1 = i;
                            ind2 = j;
                        }
                    }
            return ind2 > ind1;



        }
    }
}