Cookies

Making chocolate chip cookies starts by mixing flour, salt, oil, baking soda, and chocolate chips into a dough, which is then rolled out flat into a single plane. Circles are cut from this flattened dough, placed on a cookie sheet, and baked in an oven.

Here we care only about cutting a single round cookie that contains every chocolate chip. Once the dough is rolled out, each chip appears as a single point on the plane, so we simply need a round cookie cutter large enough to enclose all of the chips. What is the diameter of the smallest round cookie that contains all of the chips?

The first line contains a positive integer $n$ with $n \le 10$. Each of the next $n$ lines gives the coordinates of one chocolate chip on the plane. Each coordinate is an integer in the range $[0, 1000]$.

Print a single real number: the diameter of the smallest round cookie that contains all of the chips, rounded to two decimal places.