Mine

import java.io.*;class Main{public void main(String[] args) {  BufferedReader stdin = new BufferedReader    (new InputStreamReader(System.in));  int a;  System.out.flush();  a = new int(stdin.readLine());  while(a != 42) {    System.out.println(a);    System.out.flush();      a = new int(stdin.readLine());  }}}