class Solution {
    public String printMinNumber(int[] nums) {
           List<String>list=new ArrayList<>();
           for(int num:nums)list.add(String.valueOf(num));
           // 30 和3 303<330 此时30<3
           list.sort((o1,o2)->(o1+o2).compareTo(o2+o1));
           return String.join("",list);
    }
}