---

 int N = 5;
            double[] A = { 3, 5, -2, 6, 3 };
            double S = 0;

            for (int i = 0; i < N; i++)
            {
                S += A[i];
            }

            Console.WriteLine("Сумма элементов = " + S);
            Console.ReadKey();

            int N = 4;
            int[] A = { 3, -1, 10, 1 };

            int Amax = A[0];
            int k = 1;

            for (int i = 1; i < N; i++)
            {
                if (A[i] > Amax)
                {
                    Amax = A[i];
                    k = i + 1;
                }
            }

            Console.WriteLine($"Amax = {Amax}");
            Console.WriteLine($"k = {k}");
            Console.ReadKey();

            int N = 7;
            int[] X = { -1, 2, 0, 4, -3, -2, 0 };
            int[] Y = new int[N];

            int index = 0;

            for (int i = 0; i < N; i++)
            {
                if (X[i] > 0)
                {
                    Y[index++] = X[i];
                }
            }

            for (int i = 0; i < N; i++)
            {
                if (X[i] == 0)
                {
                    Y[index++] = X[i];
                }
            }

            for (int i = 0; i < N; i++)
            {
                if (X[i] < 0)
                {
                    Y[index++] = X[i];
                }
            }

            Console.WriteLine("Y = (" + string.Join(", ", Y) + ")");
            Console.ReadKey();