class Point {
  int x, y; 
  Point(int x, int y) {
    this.x = x; 
    this.y = y; 
  }
  double distanceTo(Point other) {
    int dx = this.x - other.x;
    int dy = this.y - other.y;
    return Math.sqrt( dx * dx + dy * dy ); 
  }
}