Implement abstract class Arr.

Implement class Array that extends Arr.

abstract class Arr
{
  int a[]; // array of integers
  int n; // size of array
  abstract int Sum(); // Return sum of array elements
  abstract double Average(); // Return average of array elements
}

class Array extends Arr
{
  Array (int n) // Constructor
  int Sum() // Return sum of array elements
  double Average() // Return average of array elements
}

Input

First line contains number n. Next line contains n integers in the range from 0 to 100.

Output

Print in one line the sum of array elements and their average.