题解 | #删除有序链表中重复的元素-I#
删除有序链表中重复的元素-I
https://www.nowcoder.com/practice/c087914fae584da886a0091e877f2c79
import java.util.*; /* * public class ListNode { * int val; * ListNode next = null; * } */ public class Solution { /** * * @param head ListNode类 * @return ListNode类 */ public ListNode deleteDuplicates (ListNode head) { // write code here //头节点为空返回NULL if(head==null){ return null; } //使用List的特新:有序来通过contains方法去重 ArrayList<Integer> list=new ArrayList<>(); ListNode getList=head; while(getList!=null){ //如果包含该元素则不放入集合 if(!list.contains(getList.val)){ list.add(getList.val); } getList=getList.next; } //生成链表 Integer first=list.get(0); ListNode tmp=new ListNode(first); ListNode returnList=tmp; int i=1; for(Integer num:list){ if(i==1){ i++; continue; } ListNode tmpNode=new ListNode(num); tmp.next=tmpNode; tmp=tmp.next; } return returnList; } }