PHP Compiler Testing
Nth Smallest Integer

Given an unsorted list, create a function that returns the nth smallest integer (the smallest integer is the first smallest, the second smallest integer is the second smallest, etc).

Examples

nth_smallest([1, 3, 5, 7], 1) ➞ 1

 

nth_smallest([1, 3, 5, 7], 3) ➞ 5

 

nth_smallest([1, 3, 5, 7], 5) ➞ None

 

nth_smallest([7, 3, 5, 1], 2) ➞ 3