using System;

public class Program

{

    public static void Main()

    {

int[] nums = new int[50];

​

nums[0] =200;

nums[49] = 150;

Random rand = new Random(); 

​

​

    int test = nums[0];

            for (int i = 0; i < nums[49]; i++)

            nums[i] = rand.Next(-100, 100);

        nums[0]=nums[nums.Length-1];

        nums[nums.Length-1]=test; 

        foreach( var item in nums)

​

 { 

Console.WriteLine(item.ToString()+ " ");

        }

    }

​

    }

​

​

​