class Ex1_1_2 {
  public static void main(String[] args) {
    int x, y;
    x = 2;
    y = 5;
    System.out.println("x = " + x + " / y = " + y);
    x = x + y;
    y = x - y;
    x = x - y;
    System.out.println("x = " + x + " / y = " + y);
  }
}