Alga_4

public static long[] planting(Event[] events) {

                TreeSet<Long> Tree = new TreeSet<Long>();

                for(int i = 0; i<events.length; i++){

                   if(events[i].action.equals("kihajt") && !Tree.contains(events[i].position)){
                            if(Tree.ceiling(events[i].position) != null){
                                if((events[i].position - Tree.ceiling(events[i].position) >= 250)){
                                    Tree.add(events[i].position);
                                }
                            }else Tree.add(events[i].position);

                            if(Tree.floor(events[i].position) != null){
                                    if((events[i].position - Tree.floor(events[i].position) >= 250)){
                                        Tree.add(events[i].position);
                                    }
                            }else Tree.add(events[i].position);
                   }
                   if(events[i].action.equals("villam") && Tree.contains(events[i].position)){
                            Tree.remove(events[i].position);
                   }
                }

                long[] ret = new long[Tree.size()];

                for (Long elem: Tree) {
                    ret[Tree.headSet(elem).size()] = elem;
                }

                for (Long elem: Tree) {
                    System.out.println(elem);
                }

    return ret;
    }