// Hello

class Hello {

  public static void main(String[] args) {
    int [1d] x;
    double [2d] local y;
    int [1d] local z;

    if (x == null)
      System.out.println("x==null");
    if (y == null)
      System.out.println("y==null");
    if (z == null)
      System.out.println("z==null");
    if (x != null)
      System.out.println("x!=null");
    if (y != null)
      System.out.println("y!=null");
    if (z != null)
      System.out.println("z!=null");

    x = new int [0 : 3];
    y = new double [[0 : 3, 0 : 5]];
    z = new int [0 : 5];

    if (x == null)
      System.out.println("x==null");
    if (y == null)
      System.out.println("y==null");
    if (z == null)
      System.out.println("z==null");
    if (x != null)
      System.out.println("x!=null");
    if (y != null)
      System.out.println("y!=null");
    if (z != null)
      System.out.println("z!=null");

    x = null;
    x = (int [1d]) null;
    y = null;
    z = null;

    if (x == null)
      System.out.println("x==null");
    if (y == null)
      System.out.println("y==null");
    if (z == null)
      System.out.println("z==null");
    if (x != null)
      System.out.println("x!=null");
    if (y != null)
      System.out.println("y!=null");
    if (z != null)
      System.out.println("z!=null");

    System.out.println("done.");

  }
}