unnikked

import java.util.Arrays;

/**
*	quickselect is a selection algorithm to find the kth smallest element in an 
*	unordered list. Like quicksort, it is efficient in practice and has good 
*	average-case performance, but has poor worst-case performance. Quickselect 
*	and variants is the selection algorithm most often used in efficient 
*	real-world implementations.
*	
*	Quickselect uses the same overall approach as quicksort, choosing one