Не могу понять, в чём проблема
package com.javarush.task.task19.task1926;
import java.io.*;
public class Solution {
public static void main(String[] args)throws IOException {
BufferedReader reader = new BufferedReader(new InputStreamReader(System.in));
BufferedReader fr = new BufferedReader(new FileReader(reader.readLine()));
StringBuilder sb = new StringBuilder();
while(fr.ready()){sb.append(fr.readLine());}
fr.close();
reader.close();
System.out.println(sb.reverse().toString());
}
}