import java.util.*;

public class AvgArray

{

public static void main(String args[])

{

int sum=0;

Scanner s=new Scanner(System.in);

int n=s.nextInt();

int arr[]=new int[n];

for(int i=0;i<n;i++)

{

arr[i]=s.nextInt();

}

for(int i=0;i<n;i++)

{

sum+=arr[i];

}

for(int i=n-1;i>=0;i--)

{

System.out.print(arr[i]+" ");

}

System.out.println();

double avg;

avg=(double)sum/n;

System.out.println(avg);

}

}