is$\_$sorted$($arr: StaticArray$)->$ int:

Write a function that receives a StaticArray and returns an integer that describes whether

the array is sorted. The method must return:

$1$ if the array is sorted in strictly ascending order.

$-1$ if the list is sorted in strictly descending order.

$0$ otherwise.

Arrays consisting of a single element are considered sorted in strictly ascending order.

You may assume that the input array will contain one or more homogeneous elements

$($either all numbers, or strings, or custom objects, but never a mix of these$).$ You do not

need to write checks for these conditions.

The original array must not be modified.

For full credit, the function must be implemented with O$($N$)$ complexity, with no additional

data structures $($including Static Arrays$)$ being created.