using System;


namespace Matrix_Calculations
{
    class Program
    {
        private const string
            Matrix = "Матрица: ",
            Sum = "Сумма второй строки: ",
            Composition = "Произвидение первого столбца: ",
            EmptySpace = " ";
        private const int
            Min = 1, Max = 20, MatrixSize = 3;

        static void Main(string[] args)
        {
            int[,] matrix = new int[MatrixSize, MatrixSize];
            int sum = 0, composition = 1;

            Random random = new Random();
            Console.WriteLine(Matrix);

            for (int i = 0; i < MatrixSize; i++)
            {
                for (int j = 0; j < MatrixSize; j++)
                {
                    matrix[i, j] = random.Next(Min, Max);
                    Console.Write(matrix[i, j] + EmptySpace);

                    if (i == 1)
                    {
                        sum += matrix[i, j];
                    }

                    if (j == 0)
                    {
                        composition *= matrix[i, j];
                    }
                }

                Console.WriteLine();
            }

            Console.WriteLine();
            Console.WriteLine(Sum + sum);
            Console.WriteLine(Composition + composition);
            Console.ReadKey();
        }
    }
}