using System.Linq;

public class Program

{

    public static void Main()

    {

        static void Main(string[] args)

        {

            int[] RowsAndCols = Console.ReadLine().Split().Select(int.Parse).ToArray();

​

int rows = input[0];

int cols = input[1];

int[,] matrix = new int[rows, cols];

            for (int r = 0; r < rows; r++)

            {

                var line = Console.ReadLine().Split(' ');

                int c = 0;

                foreach (var item in line)

                    matrix[r, c++] = int.Parse(item);

            }

​

            double d1 = 0, d2 = 0;

            for (int k = 0; k < rows; k++) d1 += matrix[k,k];

            for (int k = 0; k < rows; k++) d2 += matrix[k,rows-k-1];

​

            double s1 = 0, s2 = 0;

            for (int row = 0; row < rows; row++)

            {

                for (int col = 0; col < cols; col++)

                {

                    if(col > row) s1 += matrix[row,col];

                    if(col < row) s2 += matrix[row, col];

                }

            }

​

            if (d1 == d2 && s1 % 2 == 0 && s2 % 2 != 0) Console.WriteLine("YES");

            else

            {

                Console.WriteLine("NO");

                return;

            }

​

            double sd = 0;

            for (int k = 0; k < rows; k++)

            if (matrix[k, k] % 2 == 0) sd += matrix[k, k];

​

            double sr = 0;

            for (int k = 0; k < cols; k++)

            {

               if (matrix[0, k] % 2 == 0) sr += matrix[0, k];

               if (matrix[rows-1, k] % 2 == 0) sr += matrix[rows - 1, k];

            }

​

            double sc = 0;

            for (int k = 0; k < rows; k++)

            {

                if (matrix[k, 0] % 2 != 0) sc += matrix[k,0];

                if (matrix[k, cols - 1] % 2 != 0) sc += matrix[k,cols - 1];

            }

​

            double avr = (s2 + sd + sr + sc) / 4.0; 

            Console.WriteLine("The amount of money won is: {0:f2}", avr);

        }

    }

    }