ébauche intersection cercles

import java.util.*;
import java.io.*;
import java.math.*;
class Solution {

    public static void main(String args[])
    {
        Scanner in = new Scanner(System.in);
        int n = in.nextInt();
        float x[] = new float[n];
        float y[] = new float[n];
        for (int i = 0; i < n; i++)
        {
            x[i] = in.nextFloat();
            y[i] = in.nextFloat();
        }
        int first = 0;
        int last = 0;
        int turn = 1;

        while(first < 2)
        {
            for(int i = 0; i < n; i++)
            {
                for(int j = 0; j < n; j++)
                {
                    if(i != j)
                    {
                        if(crossTwo(x[i],y[i],x[j],y[j],turn))
                            first++;
                    }
                }
            }
            turn++;
        }

        System.out.println(turn);
    }
    public static boolean crossTwo(float x1, float y1, float x2, float y2, int r)
    {
        double distance = Math.sqrt( (x1-x2)*(x1-x2) + (y1-y2)*(y1-y2) );
        if(distance < r)
            return true;
        else
            return false;
    }
}