import java.util.Arrays;
import java.util.List;
import java.util.Comparator;

class Main {
    public static void main(String[ ] args) {
        List<Integer> list = Arrays.asList(0, 1, 2, null);
        System.out.print(list.stream().max(Comparator.nullsLast(Integer::compare)));
        System.out.print(list.stream().min(Comparator.nullsFirst(Integer::compare)));
    }
}