#include <cmath>

#include <cstdio>

#include <algorithm>

#define N 100010

using namespace std;

const double eps = 1e-15;

double x[N] , y[N];

int id[N];

inline double squ(double x)

{

	return x * x;

}

int main()

{

	srand(20011011);

	int n , i , j , k;

	double px = 0 , py = 0 , r = 0 , x1 , x2 , x3 , y1 , y2 , y3;

	scanf("%d" , &n);

	for(i = 1 ; i <= n ; i ++ ) scanf("%lf%lf" , &x[i] , &y[i]) , id[i] = i;

	random_shuffle(id + 1 , id + n + 1);

	for(i = 1 ; i <= n ; i ++ )

	{

		if(squ(px - x[id[i]]) + squ(py - y[id[i]]) > r + eps)

		{

			px = x[id[i]] , py = y[id[i]] , r = 0;

			for(j = 1 ; j < i ; j ++ )

			{

				if(squ(px - x[id[j]]) + squ(py - y[id[j]]) > r + eps)

				{

					px = (x[id[i]] + x[id[j]]) / 2 , py = (y[id[i]] + y[id[j]]) / 2 , r = (squ(x[id[i]] - x[id[j]]) + squ(y[id[i]] - y[id[j]])) / 4;

					for(k = 1 ; k < j ; k ++ )

					{

						if(squ(px - x[id[k]]) + squ(py - y[id[k]]) > r + eps)

						{

							x1 = x[id[i]] , x2 = x[id[j]] , x3 = x[id[k]];

							y1 = y[id[i]] , y2 = y[id[j]] , y3 = y[id[k]];

							px = (x1 * x1 * (y2 - y3) + x2 * x2 * (y3 - y1) + x3 * x3 * (y1 - y2) - (y1 - y2) * (y2 - y3) * (y3 - y1)) / (x1 * (y2 - y3) + x2 * (y3 - y1) + x3 * (y1 - y2)) / 2;

							py = ((x1 - x2) * (x2 - x3) * (x3 - x1) - y1 * y1 * (x2 - x3) - y2 * y2 * (x3 - x1) - y3 * y3 * (x1 - x2)) / (x1 * (y2 - y3) + x2 * (y3 - y1) + x3 * (y1 - y2)) / 2;

							r = squ(px - x1) + squ(py - y1);

						}

					}

				}

			}

		}

	}

	printf("%.15lf\n%.15lf %.15lf\n" , sqrt(r) , px , py);

	return 0;

}