get maximum x of array of points

Hey guys..so I have this array of points
Point[] arr = { new Point(0, 2),
new Point(1,0), new Point(3,0),
new Point(4,2), new Point(3,3) };
how can I determine the maximum X coordinate using order logn ?

 

that would be linear search..order N
i want it logn

 

Heap sort will give you n log n.