/in/Main.java:1: error: class, interface, or enum expected
        Point prePoint=null;
        ^
/in/Main.java:3: error: class, interface, or enum expected
        PointHeap pointHeap=new PointHeap(n*2);
        ^
/in/Main.java:5: error: class, interface, or enum expected
        for(int i=0;i<points.length;i++){
        ^
/in/Main.java:5: error: class, interface, or enum expected
        for(int i=0;i<points.length;i++){
                    ^
/in/Main.java:5: error: class, interface, or enum expected
        for(int i=0;i<points.length;i++){
                                    ^
/in/Main.java:8: error: class, interface, or enum expected
                pointHeap.add(prePoint);
                ^
/in/Main.java:9: error: class, interface, or enum expected
                continue;
                ^
/in/Main.java:10: error: class, interface, or enum expected
            }
            ^
/in/Main.java:12: error: class, interface, or enum expected
            prePoint=points[i];
            ^
/in/Main.java:13: error: class, interface, or enum expected
            pointHeap.add(points[i]);
            ^
/in/Main.java:14: error: class, interface, or enum expected
        }
        ^
11 errors