I enhanced the test set last night.

> Help me please, I don't understand why my solution is Wrong...
> Here is my code:
> 
> /***************************************************
>  *	Online Judge: 	Peking University
>  *	Problem: 		Finding Bovine Roots
>  *	Source:			USACO 2005 December Bronze
>  *	Author:			Camilo Andrés Varela León
>  *	Date:			2007-01-25
>  **/
>  
> import java.io.*;
> import java.util.*;
> 
> class Main {
> 	
> 	public static void main(String args[]) throws IOException {
> 		
> 		BufferedReader in = new BufferedReader(new InputStreamReader(System.in));
> 		StringBuffer buffer = new StringBuffer();
> 		
> 		long l = new Long(in.readLine());
> 		double fr = new Double(in.readLine());
> 		fr /= Math.pow(10, l);
> 		
> 		double value = (double)1 / Math.pow(10, l + 2);
> 		double error = Double.MAX_VALUE;
> 		long nextLong = 0;
> 		
> 		int a = 1;
> 		while (error > value) {
> 			
> 			double aprox = 2 * Math.log10(a + fr);
> 			aprox = Math.pow(10, aprox);
> 			nextLong = (long)Math.ceil(aprox);
> 			
> 			double raiz = Math.sqrt(nextLong);
> 			error = Math.abs((raiz - (long)raiz) - fr) / 100;
> 			a ++;
> 		}
> 		System.out.println(nextLong);
> 	}
> }