Write a function that retrieves the last n elements from an array.

Examples

last([1, 2, 3, 4, 5], 1) ➞ [5]

last([4, 3, 9, 9, 7, 6], 3) ➞ [9, 7, 6]

last([1, 2, 3, 4, 5], 7) ➞ [-1]

last([1, 2, 3, 4, 5], 0) ➞ []

Notes

• Return -1 if n exceeds the length of the array.
• Return an empty array if n == 0.