void update(point_type punkt){
			it iterator = f.find(punkt);
			it prev = iterator;
			prev--;
			it next = iterator;
			next++;
			if(iterator->value()>prev->value() && iterator->value()>next->value()){
			max.erase(next->arg());
			max.erase(prev->arg());
			max.insert(punkt);
			}
		}