int[] mas = new int[30];
        Random rand = new Random();
        int n = 30;

        for (int i = 0; i < n; i++)
        {
            mas[i] = rand.Next(-1, 5);

            Console.Write(mas[i] + " ");
        }

        Console.WriteLine();

        for (int i = 0; i < n; i++)
        {
            if (mas[i] == 0)
            {
                n--;
                for (int j = i; j < n; j++)
                {
                    mas[j] = mas[j + 1];
                }
                mas[n] = -1;
                i--;
            }
        }

        for (int i = 0; i < 30; i++)
        {
            Console.Write(mas[i] + " ");
        }