[头条笔试]坐标的题目怎么做？

本地测试通过，但是赛码网是0%，然后就较劲了，觉得不可能，甚至还用赛码网的其他在线编程题做测试，输入题目条件中的样例，也可以得到题目中的样例输出，真心求解，哭😢

import java.util.*;
public class Main {
    class Point{
        private int x;
        private int y;
        public int getX(){
            return x;
        }
        public int getY(){
            return y;
        }
        public Point(int x, int y){
            this.x = x;
            this.y = y;
        }
    }
    public void process(){
        Scanner scanner=new Scanner(System.in);
        List points = new ArrayList();
        while(scanner.hasNextLine()){
            int total = scanner.nextInt();

            for(int i = 0; i< total; i++){
                String[] pointstr = scanner.nextLine().split(" ");
                int x = Integer.parseInt(pointstr[0]);
                int y = Integer.parseInt(pointstr[1]);
                points.add(new Point(x,y));
            }
            List resultPoints = new ArrayList();
            for(int j = 0; j<points.size(); j++){
                Point currentPoint = points.get(j);
                Boolean flag = true;
                for(int k = 0; k<points.size(); k++){
                    if(points.get(k).getX() > currentPoint.getX() && points.get(k).getY() > currentPoint.getY()){
                        flag = false;
                        break;
                    }
                }
                if(flag) {resultPoints.add(currentPoint);}
            }
            Collections.sort(resultPoints, new Comparator(){
                public int compare(Point o1, Point o2) {
                    return Integer.compare(o1.getX(), o2.getX());
                }
            });
            for(int m = 0; m<resultPoints.size(); m++){
                System.out.print(resultPoints.get(m).getX());
                System.out.print(" ");
                System.out.print(resultPoints.get(m).getY());
                System.out.println("");
            }
        }
    }
    public static void main(String[] args) {
      Main m = new Main();
      m.process();    
    }
}