import java.util.*; import java.net.*; import java.io.*; class Sock{ public static String getFlag(String hostName, Integer port){ byte[] data = new byte[20]; try{ Socket socket = new Socket(hostName, port); socket.getInputStream().read(data, 0, 20); //0 to indeks gdzie zaczynay, socket.close(); } catch(IOException e){ System.out.println(e); } return new String(data, 0, 20); } } class Main { public static void main(String[] args) { Scanner scan = new Scanner(System.in); Integer port = scan.nextInt(); System.out.println(Sock.getFlag("127.0.0.1", port)); //wyprintuje SUCCESS } }