namespace TheLastOne
{
    class Program
    {
        static decimal [ , ] SortMatrix(decimal[,] matrix)
        {
            for (int i = 0; i < matrix.GetLength(0); i++)
            {
                decimal[] line = new decimal[matrix.GetLength(0)];


                for (int k = 0; k < matrix.GetLength(1); k++)
                {
                    line[k] = matrix[k, i];

                }

            }

            return matrix;
        }

        static decimal SumNegativeOnAntiDiagonal (decimal[,] matrix)
        {
            decimal Sum = 0;
            for (int i = matrix.Length; i <= 0; i--)
            {
                if (matrix[i,i]<0)
                {
                    Sum += matrix[i, i];
                }
            }
            return Sum;
        }

        static bool CheckIdentity(decimal[,] matrix)
        {
            for (int i = 0; i < matrix.GetLength(0); i++)
            {
                for (int k = 0; k < matrix.GetLength(1); k++)
                {
                    if (i==k)
                    {
                        if (matrix[i,k]!=1)
                        {
                            return false;
                        }

                    }
                    else
                    {
                        if (matrix[i,k]!=0)
                        {
                            return false;
                        }
                    }
                }

            }


            return true;
        }
       static void PrintMatrix(decimal[,] matrix)
        {
            for (int i = 0; i < matrix.GetLength(0); i++)
            {
                for (int k = 0; k < matrix.GetLength(1); k++)
                {
                    Console.Write(matrix[i,k]);
                }
                Console.WriteLine();

            }
        }
        static void Main(string[] args)
        {

            string[] line = File.ReadAllLines("matrix.txt");
            var ROW = int.Parse(line[0]);
            var Col = int.Parse(line[1]);
            var matrix =new decimal[ROW, Col];

            for (int i = 0; i < matrix.GetLength(0); i++)
            {
                var Row = line[i + 2].Split('\t').Select(decimal.Parse).ToArray();
                for (int k = 0; k < Row.Length; k++)
                {

                    matrix[i, k] = Row[k];
                }
            }

            PrintMatrix(matrix);
            CheckIdentity(matrix);
            matrix = SortMatrix(matrix);
        }
    }
}