using System;

public class Program

{

    public static void Main()

    {

    int[,] data = new int[3,4]

    {

        {5, 1, 9, 5},

        {7, 5, 3, null},

        {2, 4, 6, 8}

    };

    int smallest = data[0,0];

    int biggest = data[0,0];

    int count = 0;

​

    for (int i = 0; i < data.GetLength(0); i++)

    {

        smallest = data[i,0];

        biggest = data[i,0];

        for (int j = 0; j < data.GetLength(1); j++)

        {

            int number = data[i, j];

            if(number < smallest)

            {

                smallest = number;

            }

            else if (number > biggest)

            {

                biggest = number;

            }

            Console.WriteLine(number);

​

        }

        Console.WriteLine("ssss" + smallest);           

        Console.WriteLine("bbbbb" + biggest);

        int difference = biggest -smallest;

        count = count + difference;

        Console.WriteLine("--------------" + difference );

    }

    Console.WriteLine("výsledek je " + count);

    }

}