Problem:
Score : 600 points

Problem Statement

Given are N points (x_i, y_i) in a two-dimensional plane.

Find the minimum radius of a circle such that all the points are inside or on it.

Constraints

2 \leq N \leq 50

0 \leq x_i \leq 1000

0 \leq y_i \leq 1000

The given N points are all different.

The values in input are all integers.

Input

Input is given from Standard Input in the following format:

N
x_1 y_1
:
x_N y_N

Output

Print the minimum radius of a circle such that all the N points are inside or on it.

Your output will be considered correct if the absolute or relative error from our answer is at most 10^{-6}.

Sample Input 1

2
0 0
1 0

Sample Output 1

0.500000000000000000

Both points are contained in the circle centered at (0.5,0) with a radius of 0.5.

Sample Input 2

3
0 0
0 1
1 0

Sample Output 2

0.707106781186497524

Sample Input 3

10
10 9
5 9
2 0
0 0
2 7
3 3
2 5
10 0
3 7
1 9

Sample Output 3

6.726812023536805158

If the absolute or relative error from our answer is at most 10^{-6}, the output will be considered correct.

Solution in C++14 (GCC 5.4.1) (judge verdict: Runtime Error)

        #include<bits/stdc++.h>
        using namespace std;
        int main()
        {
          int n;
          int x[n],y[n];
          int dis,maxdis=0;
          cin>>n;
          for(int i=0;i<n;i++)
            cin>>x[i]>>y[i];
          for(int j=0;j<n-1;j++)
            for(int k=j+1;k<n;k++)
            {
              dis=sqrt(pow(x[j]-x[k],2)+pow(y[j]-y[k],2));
              if(dis>maxdis)
                maxdis=dis;
            }
          cout<<maxdis/2;
          return(0);
        }