public class Point3i
{ int x, y, z;

  Point3i(){}
  Point3i(int x, int y, int z)
  { this.x = x;
    this.y = y;
    this.z = z;
  }
  
  Point3i(Point3i p)
  { x = p.x;
    y = p.y;
    z = p.z;
  }
}