after an hour of realizing how to receive the inputs, here I am failing at test 9.
the code looks right to me
any ideas?


import java.util.*;
import java.io.*;
public class lucky {


    public static void main(String[] args) throws IOException{

    BufferedReader cin = new BufferedReader(new InputStreamReader(System.in));


        double[] ans=new double[64000];

    int n=0;
    StringTokenizer st;
    while (true) try{


        st=new StringTokenizer(cin.readLine());
        while (st.hasMoreTokens()){
            ans[n]=java.lang.Math.sqrt(Double.parseDouble(st.nextToken()));

            n++;
        }
        //System.out.println("log");

        if (!cin.ready())
            throw new Exception();

    } catch (Exception ex)
    {break;}

    n--;
    for(; n>=0; n--)
        System.out.printf("%.5f\n", ans[n]);
    }



}

The input stream is said to be 256KB at maximum, which means it can have 131072 numbers at maximum, if a KB is meant to be 1024 bytes. But you output no more than 64000 numbers. So I assume your program fails on inputs with many numbers.