Find out the center of masses of a convex polygon. Input A series of convex polygons, defined as a number n (n ≤ 100) stating the number of points of the polygon, followed by n different pairs of integers (in no particular order), denoting the x and y coordinates of each point. The input is finished by a fake “polygon” with m (m < 3) points, which should not be processed. No three points are aligned in any polygon. Output For each polygon, a single line with the coordinates x and y of the center of masses of that polygon, rounded to three decimal digits. Sample Input 401110010 3121000 7 -4 -4 -6 -3 -4 -10 -7 -12 -9 -8 -3 -6 -8 -3 1 Sample Output 0.500 0.500 0.667 0.667 -6.102 -7.089