public static void Main()
int n = int.Parse(Console.ReadLine());
int[] array = new int[n];
int[] array2 = new int[n];
for (int i = 0; i < n; i++)
array[i] = r.Next(-20, 20);
Console.WriteLine(array[i]);
for (int i = 0; i < n; i++)
for (int i = 0; i < n; i++)
Console.WriteLine("Pre-last element : {0}", temp);
Console.WriteLine("Mass");
for (int i = 0; i < n; i++)
Console.WriteLine(array[i]);
Console.WriteLine(array[i]);