import java.util.*;
import java.io.*;

class UniquePoints {
	static Set<Point> readPoints(String filename) {
		Set<Point> result = new TreeSet<>();
		try {
			Scanner s = new Scanner(new File(filename));
			while (s.hasNextLine()) {
				String line = s.nextLine();
				String[] parts = line.split(",");
				Point p = new Point(Integer.parseInt(parts[0]), 
				                    Integer.parseInt(parts[1]));
				result.add(p);
			}
			return result;
		} catch (FileNotFoundException e) {
			System.err.println("File not found: " + filename);
			return result;
		}
	}
    
	public static void main(String[] args) {
		if (args.length == 1){
			System.out.println(readPoints(args[0]));
			Point p1 = new Point(0,1);
			Point p2 = new Point(0,1);
			System.out.println(p1.equals(p2));
			System.out.println(p1.equals(p1));
			System.out.println(p1.equals("alma"));
			System.out.println(p1.equals(null));

			System.out.println(p1.hashCode());
			System.out.println(p2.hashCode());
	    
		}
	}
}